Core Web Vitals Assessment Failed: How Can You Fix It?

To fix the core web vitals assessment: failed issue, you need to identify the core web vitals issues. According to that, this can be achieved by optimizing your LCP, INP, and CLS performances.

Optimization techniques such as Image optimization, lazy loading, browser caching, CSS, and JavaScript optimization can be used to fix the core web vitals assessment: failed issue.

Core Web Vitals Assessment: Failed

Google clarified that Core Web Vitals is one of the factor that will be used to determine Search Engine Optimization (SEO) rankings. Thus, it is crucial for website owners or developers to ensure that their websites pass this assessment.

If you are a solo-premier or running a small team and do not always have access to a developer, here we will show you how you can solve the issue for your WordPress website using RabbitLoader. Also available for….other platforms

What Are Core Web Vitals?

Let’s understand the core web vitals. Google developed a set of metrics to determine a website’s performance based on the following factors:

  • The initial page loading time: how long it takes it to initially load the webpage.
  • The user interaction: how fast it responds to the user’s request.
  • The web page’s visual stability: how stable the web page is.
Core web vitals assessment passed

Based on the above factor, Google introduced the three main pillars of the core web vital which include: Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). 

Largest Contentful Paint (LCP)

The Largest Contentful Paint (LCP) determines how quickly a website loads. This user metric calculates how long it takes for the biggest element on a page, such as a hero image or a large text block, to display on the user’s browser. 

LCP

A good LCP performance can improve the website’s loading time as well as the user experience, increasing the conversion rate.

First Input Delay (FID)

First Input Delay (FID) is a metric that determines a web page’s interactivity. It is defined as the span of time between the first user interaction with a web page and the browser’s response to that user interaction.

FID

This user interaction could be tapping on a link, pressing the keyboard, or clicking a button.

Note: Google has introduced a new performance metric, Interaction to Next Paint (INP) to replace the FID.

Cumulative Layout Shift (CLS)

Cumulative Layout Shift (CLS) is a performance metric that determines a web page’s visual stability. It quantifies the amount of unexpected layout shift that occurs during the page’s loading phase.

cls

Unlike the above two performance metrics, Cumulative Layout Shifts (CLS) is not any amount of time, therefore can’t measure CLS in seconds or milliseconds. 

What Is The Meaning Of Core Web Vitals Assessment: Failed?

If one or more of the three performance metrics, LCP, FID, or CLS, on your website, does not meet the threshold values, it indicates that your site does not pass the Core Web Vitals assessment in Google PageSpeed Insights.

  • A failed LCP: It takes a lot of time to render the largest element on the web page.
  • A failed FID: A poor performance of user interaction.
  • A failed CLS: the page’s content shifts during its lifespan.

The Impact Of Core Web Vitals Assessment: Failed

According to the webFX website, 40% of online users will leave a website if it takes more than 3 seconds to render the content. hence if your website fails the core web vitals assessment, it will negatively impact the average on-page time which is an organic ranking factor

Failed core web vitals assessment

According to a survey, almost 70% of users say that an e-commerce store’s website page speed impacts their willingness to buy from it. Therefore, the poor performance of core web vitals can negatively affect your website’s conversion rate.

Not only the conversion rate but also failed core web vitals harm your Google rankings. According to a case study, redBus, the popular bus ticket platform, optimizes its core web vitals. As a result, the conversion rate has improved by 7%. Therefore, we can conclude that for many businesses, this could be a make-or-break factor. 

How To Measure Core Web Vitals?

It’s essential to understand the core web vitals assessment reports and their issues to fix them. When you audit your website’s page speed performance in Google PageSpeed Insights, the first thing you can see is the core web vitals assessment.

Google PageSpeed insights provide the core web vitals assessment based on lab and field data. While the lab data is collected from the laboratory report in the Google Lighthouse in a controlled environment, field data is collected from the Chrome User Experience Report (CrUX).

Measure core web vitals

In order to determine the core web vitals assessment report, Google set some specific values for the core web vitals. For more details, you visit our core web vitals blog.    

Google PageSpeed Insights also provides suggestions for improving the performance of the core web vitals and passing the core web vitals assessment. 

Implementing these suggestions will help you improve your core web vitals performance and boost your conversion rate by providing a seamless experience to your users. Below are the strategies for implementing these suggestions.

FAQ: what are the helpful tools to identify the core web vitals issues and optimize them?

There are several tools available online to identify your website’s issues that are failing you the core web vitals assessment. While tools like GTmatrix allow you to test individual pages for free, you might have to invest a little bit if you need a detailed assessment for the entire website on tools like GTmatrix, and DebugBear.

To fix the issues, you can either hire a web developer or use a tool like RabbitLoader which helps you optimize your entire website for the best performance.   

How To Pass The Core Web Vitals Assessment?

Here, we will discuss the most common Google PageSpeed Insights warnings and how you can easily mitigate them using RabbitLoader and passing the core web vitals assessment. 

Efficiently Encode Images

The Efficiently Encode Images warning in PSI indicates that you need to optimize your images to reduce their size without harming their quality. This could be done using lossless compression, a technique that reduces an image’s size without sacrificing its original quality.

Eficiently encode images

Any uncompressed image on your page would result in a larger page size for your website since the unoptimized image itself has a higher file size. Learn more with our previous blog.

Let’s see how RabbitLoader mitigates this issue. 

  • Losslessly Compressing The Images

Compressing large images can reduce their size. There are two types of image compression: lossless compression, which compresses images without sacrificing quality, and lossy compression, which reduces the image size along with its quality.

lossless compression

RabbitLoader’s in-built lossless compression capability reduces image size without sacrificing quality.

  • Optimizing Images By Converting Them Into Next-Gen Formats

Another effective method for resolving this Efficiently Encode Images warning is image optimization. You can resolve this issue by converting your large-sized JPEG and PNG images into next-gen image formats such as AVIF and WebP.

Serve images in next gen formats

An in-built bulk image optimizer in RabbitLoader can convert your all PNG and JPEG images to WebP and AVIF formats. Converting them to these next-gent formats can save approximately 39% of your image loading times. 

Reduce Initial Server Response Time

The time it takes for a server to respond to a browser request is known as the server response time. If your website takes a long time to respond to the browser request, you will come across this page speed warning “Reduce Initial Server Response Time”.

server response time

Let’s see how RabbitLoader can help you to resolve the “reduce initial server response time” warning. 

  • Browser Caching 

Using a browser caching technique can significantly reduce the initial server response time by temporarily storing your static resources in the browser cache during the first visit. When the visitor revisits the site, the cached content is rendered from the browser cache, reducing server response time. 

browser caching

When optimizing your website by using RabbitLoader, it takes care of your browser caching and also adds the cache invalidation to keep your cached control stale-free.  

  • Content Delivery Network

Due to the high physical distance between the visitor and the server, network latency can occur, increasing the initial server response time. It would negatively affect your user experience.

cdn

By using a premium Content Delivery Network (CDN) with 300+ edge/ proxy servers, RabbitLoader can reduce the initial server response time by minimizing the network latency. 

  • Load The Above-The-Fold Images First 

During web page rendering, the browser generally first loads all of the page’s assets, which can increase the initial server loading time. By implementing lazy loading, you can only load the assets essential to render the above-the-fold content first.

Above the fold

RabbitLoader defers your below-the-fold graphics by enabling the lazy load optimization technique. This reduces the server response time and enhances the performance of the core web vitals, particularly LCP, CLS, and INP.

  • Generating Critical CSS Files For The Above-The-Fold Content

The CSS rules required to render the above-the-fold content, are known as critical CSS. Therefore, these styles are essential for rendering the above-the-fold content. By generating critical CSS, you can reduce the initial server response time. For more details visit our previous blog.

RabbitLoader identifies the critical resources of your webpage and generates a separate file. This can help you to improve the core web vitals performance especially LCP and INP performance.  

Avoid Enormous Network Payloads

If your website’s page size exceeds the recommended size (less than 1600 KiB), Google PageSpeed Insights triggers the error “Avoid Enormous Network Payloads” for pages that do not adhere to this recommendation. Therefore, to mitigate this warning, you need to optimize the core web vitals by following the below techniques along with the above techniques:

Avoid network payloads
  • Minify Stylesheets, Scripts, And HTML Files

Minifying stylesheets, scripts, and HTML files can reduce the total page size by reducing the unnecessary characters from these files. These unnecessary characters can be comments, line breaks, and white press which developers often use to increase the readability.

RabbitLoader minifies these resources to mitigate this Avoid Enormous Network Payloads warning and improve your core web vitals performance.

  • Compress All Resources Files

Compression is a technique for reducing the size of CSS and JavaScript files by reducing the redundancy of the code. In simple words, by compressing, you can replace the repeated strings with a single pointer, decreasing the page size.

Minify Resources

Resource compression can be of two types: GZIP and brotli. While GZIP is the traditional compression technique, brotli uses the modern compression method. RabbitLoader uses brotli compression and helps you pass the core web vitals assessment by optimizing them.     

  • Reduce Unused CSS

Reduced unused CSS is the most common Google PageSpeed Insights warning if you don’t use one or more than one CSS style on your website but define it in the stylesheets. This also increases the page size.

Reduce unused css

When you are using RabbitLoader for website optimization, in the optimized version, you get a new CSS file where only the required CSS rules will be present. Therefore, your page size will be significantly reduced, which will positively affect your core web vitals performance.

Image Elements Do Not Have Explicit Width And Height

Adding an image without setting the proper width and height can trigger the “image elements do not have explicit width And Height” warning. This is one of the most common reasons for your poor CLS score.

Image element do not have explict

RabbitLoader automatically resizes your images to fit every screen size, preventing shifting and enhancing both the user experience and CLS performance. Therefore, you can easily pass the core web vitals assessment. 

Avoids An Excessive Dom Size

The browser creates a DOM tree during web page loading. A large DOM size often increases memory usage, and so does the webpage loading time, affecting your core web vitals assessment. To solve this warning, you can follow the techniques:

Avoid an exassive dom size
  • Avoid Using Third Party Script

When you use a third-party script, like Google ads, the DOM size can be increased, slowing your website’s page speed. So, in order to pass core web vitals, you need to avoid using third party scripts.  

  • Don’t Use Too Many Optimization Plugins

Plugins can optimize your website’s page speed performance, but sometimes, using too many plugins can decrease your website’s performance. They also have stylesheets and scripts. During a page, these files need to be executed, slowing your website by increasing the DOM size.

RabbitLoader is an all-in-one optimization tool with 10+ optimization features that prevent the use of too many optimization plugins, mitigating this “avoid an excessive DOM size”. Therefore you don’t need to invest your money in using different optimization plugins.    

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RabbitLoader is able to reduce the DOM size by compressing your HTML file. Also when you are using RabbitLoader, you don’t need to use too many plugins. As you can see, RabbitLoader can optimize almost all resources, thus, you don’t need to use too many plugins.

Minimizes Main-Thread Work 

Google PageSpeed Insights triggered the “Minimize main-thread work” warning if the main thread is blocked by the other tasks. This is one reason your core web vitals assessment might fail,

Minimize main thread work

Minimizing the main thread work can speed up your website and improve the performance of Interaction to Next Paint (INP). The best practice is to optimize your JavaScript files to minimize the main thread work.

  • JavaScript Optimization 

JavaScript file is used to make an interactive web page and increase the average on-page time. However, JavaScript blocks the main thread and increases the INP time. 

Some JavaScript functions are needed during the initial loading time like any warning or alerting pop-up. Apart from these functions, RabbitLoader defers the rest of the non-priority JavaScript functions, improving the initial loading time.

In addition, RabbitLoader supports multithreading, so we can use other threads simultaneously if the main thread becomes busy.

Eliminate Render-Blocking Resources

An unoptimized image, unused CSS, and JavaScript files block the main thread and act as render-blocking resources. Because of them, you can see the warnings eliminate render-blocking resources”.

Eliminate Render Blocking resources

Therefore by optimizing the image, CSS, and JavaScript file, you can easily eliminate the render-blocking resources and pass the core web vitals assessment. We have already discussed the optimization techniques.

A quick recap of the core features of RabbitLoader:

  • Losslessly compressing  the images 
  • Optimizing the images by converting them into WebP and AVIF format
  • Using a browser caching mechanism
  • Using a premium Content Delivery Network (CDN)
  • Loading the above-the-fold images fast
  • Generating critical CSS
  • Minifying stylesheets, scripts, and HTML files
  • Compressing all resource files
  • Reducing the unused CSS
  • Optimizing the JavaScript files
  • Allowing multi-threading

Conclusion 

Is your Core Web Vitals assessment: Failed in Google PageSpeed insights? As discussed, it directly affects your user experience, conversion rate, and Google rankings. By optimizing your core web vitals you can easily pass the core web vitals assessment.

Here we have mentioned a non-coding solution, RabbitLoader which can help you pass the core web vitals assessment and increase the overall score in Google PageSpeed Insights.

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What Is The Largest Contentful Paint And How To Optimize to Pass the Core Web Vitals. 

The Largest Contentful Paint (LCP) is one of the 3 pillars of the Core Web Vitals. It can be optimized in two ways: either by implementing optimization techniques such as image, CSS, and JavaScript optimization, or using an all in one  performance optimization plugin  like RabbitLoader.

Largest Contentful paint

Prioritizing the user experience, Google have added the Largest Contentful Paint to measure a webpage’s initial loading time, Cumulative Layout Shifts (CLS) to quantify the page’s stability, and Interaction to Next Paint (INP) to analyze the website’s interactivity with users. 

Here we will explain the Largest Contentful Paint (LCP) in detail and how to optimize this to improve PageSpeed performance & pass the Core Web Vital test.   

What Is The Largest Contentful Paint (LCP)?

The Largest Contentful Paint (LCP) analyzes the time it takes to display the largest content of your website in the user’s browser. 

This performance metric is used to analyze a page’s initial loading time. A hero image, text blocks (such as headlines, and paragraphs), and video thumbnails can be considered as the largest contentful element.

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A good LCP time can help you achieve a desirable PageSpeed scores, lower bounce rate, and higher Google rankings. 

What Is Considered An Ideal Largest Contentful Paint (LCP) Time?

If you want to be in a green zone in the PageSpeed insight test, your LCP time needs to be less than 2.5 seconds. An LCP score between 2.5 seconds and 4.0 seconds is considered moderate performance, and Google always suggests improving it.

LCP gtmetrix

If a user needs to wait more than 4.0 seconds, it’s categorized as a poor LCP performance.  

The Difference Between LCP And FCP

Although Largest Contentful Paint (LCP) and First Contentful Paint (FCP) both analyze the initial loading time of a web page, there are some differences in their functionality. 

Largest Contentful Paint , lcp vs fcp

Where the Largest Contentful Paint (LCP) is used to measure the span of time it takes to render the largest elements (a hero image or text blocks) of a web page, the First Contentful Paint (FCP) calculates the time it takes to display a non-white canvas. 

The Reason Behind A Poor LCP Score

Several factors can affect the Largest Contentful paint (LCP). Let’s mention the most common reasons behind poor LCP performance.

  • A slow server response time
  • Unoptimized images 
  • Unoptimized CSS 
  • Not implementing Lazy Loading
  • Unoptimized JavaScript files
  • High network latency.

How To Optimize LCP Performance? 

To improve your PageSpeed performance, you need to optimize the Largest Contentful Paint (LCP) performance along with the other core web vital metrics. Let’s dive into the most effective optimization strategies to improve the LCP performance.  

LCP pagespeed insights

Reduce The Initial Server Response Time

Using a browser and CDN caching mechanism can significantly reduce the initial server loading time by temporarily storing static resources like stylesheets, scripting and HTML files, and images in the browser cache and proxy server.     

Manually increasing a caching mechanism requires too much effort, especially if you are not from a technical background. However, using RabbitLoader, you can easily implement a browser caching mechanism on your website in a few minutes. 

Reduce server response time

On the other hand, when you use RabbitLoader, you don’t need to invest money for CDN. RabbitLoader reduces network latency through its in-built content delivery network, which has 300+ edge/proxy servers. 

Serve The Images In Next-Gen Format

Though a high-resolution image can make a website more appealing, it can also negatively affect its PageSpeed performance by increasing the page file size. Converting the images into next-gen formats such as WebP and AVIF can improve the website’s loading performance.

Largest Contentful Paint

Manually converting images into next-gen formats one by one requires a lot of time and effort, especially when you have a large website or any e-commerce website. 

When you are using RabbitLoader, it converts your images into next-gen formats through its bulk image optimization feature. For more details, please read our Next-Gen Formats blog.

Add Lazy Loading

To defer the offscreen images, you need to implement lazy loading to them. By implementing lazy loading (known as on-demanding loading), you can instruct the browser to load only the images required for rendering the viewport instead of all the images when the webpage is loading for the first time. 

The remaining images will load when they are required, improving the LCP time.   

When optimizing your website’s PageSpeed performance with RabbitLoader, you don’t need to implement lazy loading separately. RabbitLoader implements the Lazy loading for below the fold images automatically & improves your LCP score. 

Optimize the CSS & JavaScript files

CSS, JavaScript, and HTML files are fundamental resources for your website. However, unoptimized CSS and JavaScript files can block the main thread and have a negative impact on the LCP of your website.

Largest Contentful Paint

RabbitLoader optimizes the CSS & javascripts by reducing unused CSS and JavaScript, minifying the codes, and, most importantly, generating a separate critical CSS file that is unavoidable for achieving a good PageSpeed score, where most optimization tools lags behind.

Optimize LCP Performance With RabbitLoader 

As you can see, optimizing LCP performance can be challenging, especially when you have a large website or a non-technical background. However, RabbitLoader makes it very easy. With a few clicks, you can optimize your website’s LCP & other Core Web Vital  metrics.

Install RabbitLoader to optimize your website’s PageSpeed performance and provide your user with a fast-loading website. 

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What Is Total Blocking Time (TBT) & How to Optimize It to Boost The PageSpeed Score?

You may have encountered the term Total Blocking Time (TBT) while analyzing your PageSpeed performance in Google PageSpeed Insights or GTmetrix. But what is Total Blocking Time?

Google added this Total Blocking Time (TBT) metric to its PageSpeed & lighthouse tests to analyze the span of time when the main thread is blocked and the user needs to wait to see the website’s content.

Total blocking Time

Google PageSpeed Insights considers TBT along with four other metrics to determine the PageSpeed score. 

Here, you’ll learn everything you need to know about Total Blocking Time (TBT) and how you can easily optimize your TBT performance by using RabbitLoader without needing coding skills. 

What Is Total Blocking Time (TBT)?

Total Blocking Time (TBT) accounts for 30% of the overall Google PSI score. This performance metric is used to analyze the load responsiveness of a website. In simple words, TBT measures the span of time, a long task (which takes more than 50 ms ) blocks the main thread and negatively affects your page’s usability. 

TBT

Let’s understand TBT with an example. Assume, there are a total of 4 tasks in which task 1 takes 150 ms, task 2 takes 30 ms, task 3 needs 100 ms, and finally, task 4 requires 350 ms.The TBT for these 4 tasks combines would be 450 ms (100+50+300).

Task Time Required (in milliseconds )Blocking time (in milliseconds )
Task 1150(150-50)= 100
Task 230Not considerable 
Task 3100(100-50)= 50
Task 4350(350-50)= 300
Total required time= 630 msTotal Blocking Time= 450 ms

How To Measure Total Blocking Time?

You already understand how Total Blocking Time is calculated. Here we will mention the helpful tools to measure the Total Blocking Time. There are several tools available to measure TBT. Let’s discuss the two most popular online tools to measure it.

Google PageSpeed Insights

Total blocking time peformance

Google PageSpeed Insights considers 5 performance metrics to determine the PageSpeed score. Among these 5 metrics, TBT is one of them. To know how to measure it in Google PageSpeed Insights, read our PageSpeed Insights blog.

GTmetrix 

GTmetrix is the best alternative tool for measuring PageSpeed performance. Its advantage over Google PSI is that it allows customizing the test location and device. For more details, read our post on GTmetrix.  

Total blocking time tbt gtmetrix

What Is An Ideal Total Blocking Time?

In order to categorize the performance of Total Blocking Time (TBT), google sets some boundary values. To be in a green zone, your Total blocking Time should be less than 300 ms for the whole page Let’s explore the criteria.

TBT time (in milliseconds)StatusColor 
Less than 300 msGoodGreen
In between 300 ms to 600 msModerate (need to improve)Orange
More than 600 ms PoorRed 

The Reason Behind A High Total Blocking Time

Before discussing the solution, it’s important to know the reason behind a high TBT. Let’s explore the most common causes that can inflate the Total Blocking Time (TBT).

  • A high JavaScript execution time due to the unoptimized JavaScript files
  • An unoptimized  CSS file
  • Using a huge number of third-party scripts
  • A high main thread work. 
  • An excessive DOM size. 
Total Blocking Time

Optimize TBT With RabbitLoader

Optimizing Total Blocking Time can be challenging as it requires extensive modification of resource files such as stylesheets, HTML, and JavaScript files. To prevent these technical aspects, you can install RabbitLoader. Let’s see how RabbitLoader optimizes your TBT.

  • Compress Your Resource Files
  • Minifying CSS and JavaScript 
  • Optimize Your CSS Files
  • Optimize JavaScript Files

Compress Your Resource Files

Compressing is a method for easily reducing the size of your resource file by minimizing the redundancy in your coding file. The most popular two types of compression are GZIP and Brotli.

The most traditional compression method is used in GZIP, whereas the Brotli uses a modern algorithm. 

RabbbitLoader uses the Brotli compression method and compresses your HTML, CSS, and JavaScript files, resulting in significant improvement of The Total blocking Time performance.  

Minifying JavaScript And CSS Files

When it comes to improving the TBT performance, minification of JavaScript files and CSS stylesheets is one of the unavoidable optimization strategies. By removing white spaces and unnecessary comments from your CSS and JS files, you can easily reduce the total file size.   

Total Blocking Time (1)

Doing this manually can be a daunting task for a large website, by just installing RabbitLoader, you can easily reduce the file size by minifying your JS and CSS files without any tweaks.

Optimize Your CSS Files

Although a CSS file’s aesthetic contribution is huge in a website’s design, an unoptimized CSS can negatively affect the performance of TBT metrics, leading to a slow loading speed. 

There are two ways to optimize your CSS files: reducing the unused CSS and generating critical CSS. When you use RabbitLoader, it will optimize your CSS stylesheets by identifying and reducing the unused CSS and creating a file for your critical CSS. For more details, on how CSs is optimized by RabbitLoader you can read the Reduce Unused CSS blog and the Critical CSS blog. 

Optimize JavaScript Files 

JavaScript optimization is another process that can significantly reduce the TBT and mitigate the Google PageSpeed warning “Reduce JavaScript Execution time”. Some techniques are involved in JavaScript Optimization which includes:

TBT graph
  • Add a defer attribute in the HTML file for each non-critical JavaScript function.
  • Code splitting.
  • Minifying and compressing JavaScript files. 

When you use RabbitLoader for other optimization purposes, you don’t need to worry about each optimization technique. RabbitLoader will look after your JavaScript optimization among other optimization techniques needed for a lightning fast website. 

Conclusion 

The Total Blocking Time (TBT) is one of the most important performance metrics that holds 30% weightage of the overall PageSpeed score in Google PSI. To increase user engagement on your website, you need to optimize the performance of TBT along with the other performance metrics. 

Optimize your WordPress, Shopify, Php or Laravel websites with just a few clicks, improve their PageSpeed performance in just 5 minutes by  installing RabbitLoader.

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A Guide to Resource Loading and its Importance in Web Development

Resource Loading is a crucial aspect of web development that plays a significant role in the user experience, search engine optimizations, and cross-device compatibility of a website. It refers to the process of fetching and downloading the various elements and resources of a website, such as images, videos, stylesheets, and scripts, from a server to the user’s browser. 

In this blog post, we will delve into the world of Resource Loading and its significance in web development. From explaining what Resource Loading is and how it works to exploring the importance of Resource Loading for user experience, SEO, and cross-device compatibility, this post will provide you with an overview of everything you need to know about Resource Loading. Additionally, we will cover best practices for Resource Loading, common challenges, and solutions to ensure that your website is optimized and runs smoothly.

What is Resource Loading? 

Resource Loading refers to the process of fetching and downloading resources from a server to the user’s browser. The resources loaded on a website can include images, videos, stylesheets, and scripts, among others. These resources are then used to render the website for the user. 

There are two types of resources that can be loaded on a website: blocking and Non-blocking resources. Blocking resources are resources that must be loaded before the page can be displayed, such as stylesheets. Non-blocking resources are resources that can be loaded asynchronously, in parallel with the main page, such as images and scripts. 

The loading process begins when the user requests a page by entering its URL in the browser. The browser then sends a request to the server, which sends back the HTML file, along with any other resources that the HTML file calls for. The browser then parses the HTML file and requests any additional resources that the HTML file calls for, such as images, stylesheets, and scripts. 

Once the resources are fetched and loaded, the browser can display the complete webpage to the user. The loading process can take anywhere from a few milliseconds to several seconds, depending on the style and complexity of the website, as well as the user’s internet connection speed. 

resource loading

Importance of Resource Loading: 

Resource Loading is an important aspect of web development for several reasons, including: 

  1. User Experience and Page Speed: 

The speed at which a website load is crucial for user experience. If a website takes too long to load, users may become frustrated and leave the site, leading to a high bounce rate. This can negatively impact the website’s search engine rankings and overall user engagement.

  1. Search Engine Optimization: 

Search engine optimization (SEO) is the process of optimizing a website to rank higher in search engine results pages (SERPs). One of the factors that search engines use to rank websites is page speed, and this includes the speed at which resources load, a fast-loading website is more likely to rank higher in SERPs than a slow-loading website.

  1. Responsive Web Designs and Cross-Device Compatibility: 

In today’s world, it is important for websites to be accessible on a variety of devices, including desktops, laptops, tablets, and smartphones. Resource Loading plays a crucial role in responsive web design and cross-device compatibility, as the resources must be loaded quickly and efficiently, regardless of the device or connection speed being used.

  1. Performance and Scalability: 

Optimizing Resource Loading can also improve the overall performance and scalability of a website. A slow-loading website can result in high bounce rates, low engagement, and poor user experience, which can have a negative impact on the performance and scalability of the site. 

On the other hand, a fast and efficiently loaded site can ensure that the site is able to handle increasing traffic and provide a positive experience for users.

Resource Loading is an essential aspect of web development that plays a key role in the user experience, SEO, cross-device compatibility, and performance and scalability of a website. By optimizing Resource Loading, you can ensure that your website provides a fast and seamless experience for users and that it is able to perform well and scale as your traffic grows.

resource loading

Measuring Resource Loading: 

Resource Loading can be measured in several ways: 

  1. Page Load Time: 

Page load time is one of the most common metrics used to measure Resource Loading. This metric measures the time it takes for a page to fully load, including all of its resources, such as images, stylesheets, scripts, and fonts. 

Page load time is an important metric as it provides a direct measure of the user experience, as users expect pages to load quickly and efficiently.

  1. Time to First Byte(TTFB): 

Time to first byte (TTFB) is another metric that measures Resource Loading. TTFB measures the time it takes for the first byte of data to be received from the server after a request has been made. 

This metric provides insight into the performance of the server and the efficiency of the resource-loading process.

  1. Page Weight: 

Page weight is a metric that measures the total size of a page, including all of its resources. Page weight is an important metric as it directly affects the page load time, with larger pages taking longer to load.

 By optimizing the page weight, you can reduce the page load time and improve the user experience.

  1. Resource Load Time:

Resource load time is a metric that measures the time it takes for individual resources to load. This metric provides insight into the performance of specific resources that help identify any resource that may be slowing down the page.

  1. Performance Tools:

There are various performance tools available, such as google page speed insights, google lighthouse and GTmetrix, that can be used to measure Resource Loading. These tools provide a comprehensive analysis of Resource Loading, including metrics such as page load time, TTFB, page weight, and resource load time, as well as recommendations for optimizing Resource Loading.

resource loading,website Speed test

Resource Loading can be measured in several ways, including page load time, TTFB, page weight, resource load time, and using performance tools. By measuring Resource Loading, you can gain insight into the performance of your website and identity any areas that need optimization to improve the user experience.

FAQs:

What is a Good Resource Loading Time?

There is no one-size-fits-all answer to what constitutes a “good” Resource Loading score, as this can depend on a variety of factors, including the type of website, its content, and the target audience. 

However, here are some general guidelines to consider when evaluating Resource Loading performance for each of the optimization methods:

Page load time: a page load time of 2-3 seconds is a considered fast 

The number of requests: a lower number of requests can lead to faster page load times.

Page size: a good Resource Loading score would be to keep the page size under 2 MB 

Core web vitals: in addition to the above metric you should also monitor your websites performance against the core web vitals which are the 

First Input Delay 

Cumulative Layout Shift 

Largest Contentful Paint

Best practices for Resource Loading:

To ensure that your website is optimized for Resource Loading, it is important to follow best practices. Some of the best practices include:

  1. Minimizing HTTP Requests:

One of the most effective ways to optimize Resource Loading is to minimize the number of HTTP requests that are made. Each HTTP request adds to the loading time of a page, so reducing the number of requests can significantly improve page speed. To minimize HTTP requests, you can use CSS sprites, combine multiple stylesheets into one, and optimize images by reducing their size and using the appropriate format.

  1. Compression and Minification:

Compression and minification are techniques used to reduce the size of resources, such as stylesheets and scripts, which can result in faster loading times. Compression involves reducing the size of files by removing redundant information, while minification involves removing unnecessary whitespace, comments, and other elements from the code.

  1. Caching and Preloading:

Caching involves storing frequently used resources on the user’s device so that they do not have to be reloaded every time the page is visited. Preloading involves loading resources in the background before they are actually needed so that they are available instantly when required. Both caching and preloading can significantly improve the speed of Resource Loading.

  1. Async and Defer Attributes:

The async and defer attributes can be used to control the loading of resources on a page. The async attribute specifies that a resource should be loaded asynchronously, allowing the browser to continue rendering the page while the resources are being loaded. The defer attribute specifies that a resource should be loaded only after the page has finished parsing, ensuring that the resource does not block the rendering of the page. 

  1. Lazy Loading:

Lazy loading is a technique in which resources are loaded only when they are needed, rather than loading all resources at once. This can significantly improve the loading speed of a page, especially for large and complex websites. Lazy loading can be implemented using JavaScript, allowing resources to be loaded only when they come into view, or as they are requested by the user.

  1. Image Optimization:

Image optimization is another important aspect of Resource Loading. Large and unoptimized images can significantly slow down the loading speed of a page, so it is important to optimize images by reducing their size, using the appropriate format for example JPEG for photos, PNG for graphics, and compressing them if necessary.

Check out: Defer Loading jQuery in WordPress

resource loading

Implementing best practices for Resource Loading is essential for optimizing the performance of your website and providing a better user experience. By reducing the number of requests, reducing the number of requests, minification, compression, etc.

While these optimizations can be done manually, they can be time-consuming and challenging to implement and maintain. Fortunately, there are tools like RabbitLoader available that can automate many of these optimizations for you, saving you time and effort while ensuring that your website is optimized for performance and provides the best possible user experience.

FAQs:

What are async and defer?

Async and defer are attributes that can be added to script tags in HTML to control the loading and execution of JavaScript files.

Async allows the script to be loaded and executed asynchronously, meaning that it does not block the loading of other resources or the rendering of the page. This can result in faster load times.

Defer is similar to async in that it allows the script to be loaded and executed asynchronously however unlike async, the defer attribute guarantees that the scripts marked as defer will be executed in the order in which they appear in the HTML.

Common Challenges and Solutions:

Despite following best practices for Resource Loading, there are still some common challenges that can arise, some of these challenges include:

  1. High HTTP Request Count:

One of the most common challenges in Resource Loading is having a high number of HTTP requests. This can result in a slow-loading website and poor user experience, so it is important to minimize the number of requests by combining resources and optimizing images.

resource loading
  1. Blocking Resources:

Blocking resources, such as stylesheets, can slow down the loading of a page, as they must be loaded before the page can be displayed, to avoid this, it is important to optimize blocking resources by compressing and minifying them, as well as using the async or defer attributes to control their loading.

  1. Large Resource Size:

Large resource sizes can also slow down the loading speed of a page, so it is important to optimize resources by compressing and minifying them, as well as using lazy loading and image optimization techniques.

resource loading

Conclusion: 

In conclusion, Resource Loading is a crucial aspect of web development that plays a significant role in the user experience, SEO., and cross-device compatibility of a website. By following best practices for Resource Loading, and optimizing images, you can ensure that your website is optimized for fast and efficient Resource Loading. Additionally, by being aware of common challenges and solutions, you can troubleshoot any issues that may arise and ensure that your website runs smoothly and efficiently.

What Is The First Input Delay And 3 Ways To Optimize It To Pass The Core Web Vitals Assessment?

First Input delay (FID) is an essential performance metric that Google uses to measure a website’s PageSpeed performance. 

When it comes to a website’s success, delivering a fast-loading website is crucial. But how do you determine if your website’s PageSpeed performance is fast or not? Here’s the First Input Delay that comes into the picture along with the other performance metrics. 

First input Delay

Let’s understand about the First Input Delay (FID) metric and explore the powerful strategies to optimize the FID in order to improve the Google PageSpeed score. 

Note: Google developed and launched a new metric Interaction to Next Paint (INP) to replace the FID metric in March 2024.  

What Is The First Input Delay?

Google developed the First Input Delay to measure a web page’s responsiveness. In simple words, the First Input Delay (FID) calculates the span of time from when a visitor first interacts with the web page to when the web page starts giving the response. This is also known as input latency.

First Input Delay

Let’s understand with an example. Assume you click on a link after opening a web page. FID measures the time between clicking that link and the time when the browser starts responding to it. This First Input Delay is measured in milliseconds (ms).  

The Difference Between FID And INP

To better understand PageSpeed performance, Google replaced the First input Delay with a new metric: Interaction to Next paint (INP). But how does INP differ from the FID?

Let’s explore how the First Input Delay (FID) differs from the Interaction to Next Paint (INP). 

First Input Delay Interaction to Next Paint 
FID is used to measure only the initial delay between the browser response and the user’s first interaction. INP provides a comprehensive view of the entire website’s interaction with the user. 
FID doesn’t measure the time a browser takes to load interactive scripts after the initial page loading.Interaction measures this time too.

The Top Helpful Tools To Measure The First Input Delay

Here, we will see the most helpful tools to measure the First Input Delay (FID) of your website.

  • Google PageSpeed Insights

Google developed an online tool, Google PageSpeed Insights to analyze the performance of core web vitals and provide a PageSpeed score based on a few key performance metrics.

To measure the First input Delay (FID), you need to enter your website’s URL and click on the analyze button and you would see the FID along with various other important metrics.

Along with your FID score, PageSpeed insight would also suggest improvements to get your websites a good FID value & pass the Core Web Vitals.

CORE WEB VITALS- FID
  • GTmetrix

GTmetrix is the best alternative tool to measure the performance of the core web vitals. This online tool allows you to customize your test location ,device, network connection, and browser.

What Is A Good FID Time?

Google sets threshold values for each performance metric to categorize performance. Let’s examine the threshold values of FID metrics. 

  • If the FID value is less than 100 ms, Google considers this a good FID time and marks it in green.
  • A FID time between 100 ms and 300 ms indicates that it needs to be reduced to pass the core web vitals test. Google marks it in orange.
  • If the FID time exceeds 300 ms, your website failed the core web vitals assessment, and Google will mark it in red. 

How To Improve FID Performance?

At this point, you are aware of a good FID time. If your website’s FID time is more than 100 ms, you need to optimize your First Input Delay to achieve a good PageSpeed score and enhance the user experience by improving your website’s performance.  

Let’s see how you can improve the FID performance using your technical skills only, it might take a little time & needs some technical skills. We will also see how you can do this within a few minutes just by installing RabbitLoader.

Minimize main thread work /Break up the long tasks

Breaking up the JavaScript code is one of the most effective ways to improve your website’s FID time. In such cases, you need to identify the long tasks that increase the FID time by blocking the main thread. Then you must split them into smaller tasks. It can minimize your main thread also. 

img-45

By allowing multi-threading, which means that if the main thread is busy with critical tasks, some non critical tasks could be moved to the web workers. This would need a very specialized set of skills to be able to implement it on your website.

Check more: Minimize main thread work

Whereas, RabbitLoader implements multi-threading and optimizes your website for the perfect FID value without needing you to write a single line of code.

Compressing and minifying CSS and JavaScript files

The loading speed of a website can also depend on the page size. In your CSS and JavaScript file, many characters such as line breaks, and comments are present which unnecessarily increases the page size for the browser, slowing down the loading speed.

js css minify

Compression and minification are the best ways to mitigate this issue. Manually removing these unnecessary characters from your CSS and JavaScript file might need a lot of time and effort especially if the website has a lot of CSS codes.

When using RabbitLoader, you don’t need to put any extra for this. Along with the other optimization techniques, RabbitLoader also takes care of this. For more details on resource minification, please checkout our Minify Resources blog. 

Defer the JavaScript functions 

During the page rendering, in general, the browser loads every resource. This would increase the loading time. You can improve the loading time by deferring the JavaScript functions which are not required for the initial loading time. This can be achieved by adding a syntax like the below example,

Async vs Defer
Syntax: <script src="https://www.domain.com/file.js" defer></script>  

If you are technically sound, you can easily defer your non-critical JavaScript functions, but if you are not from a technical background, the best way to optimize FID is to install RabbitLoader.

Final Thoughts  

Even though Google replaced this FID with INP, Google PageSpeed still shows the FID metric on its tests. When you work on improving FID, your INP time will also be improved. So, if you are struggling with a poor FID score, you need to implement the above strategies. 

Whether you do it manually or using an optimization tool like RabbitLoader it is up to you.If you want an effortless solution, optimize your FID performance with RabbitLoader. 

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