Recommendations on How to Improve your Web App and Apps Performance

(Also Refer Google Site Kit plugin)

1) ELIMINATE RENDER-BLOCKING RESOURCES

Eliminating render-blocking resources is a technique that can improve the loading performance of a website. When a web page is loaded, the browser must download and process all the resources (such as images, scripts, and stylesheets) that are required for the page to be displayed correctly.

If any of these resources are “render-blocking,” it means that the browser must fully download and process them before it can begin to display the page. This can cause a delay in the time it takes for the page to become visible to the user, which can negatively impact the user experience.

To eliminate render-blocking resources, there are a few techniques that can be used:

Defer loading of non-critical resources: Non-critical resources, such as images or scripts that are not immediately needed for the page to be displayed, can be deferred until after the page has loaded.

Async loading of scripts: Scripts can also be loaded asynchronously, which means that they will not block the loading of the page.

Inline critical resources: Critical resources can be included directly in the HTML code of the page.

Optimize and Minimize the resources: Optimizing images, minimizing CSS and JavaScript can help to reduce the size of the resources that need to be loaded and can speed up the page load time.

2) REDUCE UNUSED JAVASCRIPT

Reducing unused JavaScript is an important technique for improving the performance and maintainability of a web app. Unused JavaScript refers to code that is included in a website but is not actually needed for the page to function properly.

Including unnecessary JavaScript on a website can have several negative impacts:

Increased page load time: The more JavaScript that needs to be downloaded and processed by the browser, the longer it will take for the page to load.

Increased memory usage: Unused JavaScript can consume additional memory on the user’s device.

Maintenance issues: Unused JavaScript can make it more difficult to maintain and update a website.

There are several techniques that can be used to reduce unused JavaScript:

Code reviews: Regularly reviewing the codebase and identifying any unnecessary or outdated code.

Use of bundlers and modules: Using tools like webpack or Browserify.

Use of code splitting: Loading only the code needed for the current page.

Use of linting tools: Tools like ESLint can help to identify and remove unused code.

Use of performance monitoring tools: Tools like Google Lighthouse or WebPageTest can help to measure the performance impact of unused JavaScript.

3) SERVE IMAGES IN NEXT-GEN FORMATS

Serving images in next-gen formats can significantly improve the performance of a web app. Next-gen image formats, such as WebP and AVIF, provide higher quality images with smaller file sizes compared to traditional formats.

Here are some ways to serve images in next-gen formats:

Use of image compression tools: Tools like Squoosh or Guetzli.

Use of modern web browsers: WebP and AVIF are supported by modern browsers.

Use of server-side conversion: Convert images to next-gen formats when requested by the browser.

Use of element: Specify multiple versions of an image in different formats.

Use of CDN: A CDN that supports next-gen formats can serve these images efficiently.

4) DEFER OFFSCREEN IMAGES

Deferring offscreen images can improve the loading performance of a website. Offscreen images are images that are not currently visible on the user’s screen.

To defer offscreen images, several techniques can be employed:

Lazy loading: Deferring the loading of images until they are needed by the user.

Use of

Use of the loading attribute: The loading attribute can defer loading images.

Use of Intersection Observer API: To detect when an element is in the viewport.

5) EFFICIENTLY ENCODE IMAGES

There are various ways to efficiently encode images:

Lossless compression: Reduces file size without quality loss.

Lossy compression: Reduces file size by discarding some image data.

Vectorization: Represents an image as a set of mathematical equations.

Transform coding: Uses mathematical transformations for compression.

6) REDUCE UNUSED CSS

Reducing unused CSS can improve the performance of a web application. There are several techniques to reduce unused CSS:

Code refactoring: Reviewing and simplifying existing CSS code.

Minification: Removing unnecessary characters to reduce file size.

Unused CSS removal: Using tools like PurgeCSS to identify and remove unused CSS.

CSS inlining: Inlining critical CSS in the head of the HTML document.

7) PROPERLY SIZE IMAGES

Properly sizing images can greatly improve web performance. Techniques for properly sizing images include:

Image optimization: Compressing and optimizing images.

Resizing images: Adjusting image dimensions to match display size.

Use of responsive images: Providing different versions of an image for different resolutions.

Use of CSS to scale images: Using CSS properties for scaling images efficiently.

8) AVOID ENORMOUS NETWORK PAYLOADS

Avoiding enormous network payloads can improve web application performance. Techniques include:

Minification: Removing unnecessary characters from the codebase.

Code splitting: Breaking up large JavaScript files into smaller chunks.

Gzip compression: Compressing data sent over the network.

Content delivery networks (CDNs): Using a CDN to reduce loading times.

Data caching: Caching data client-side to enhance performance.

9) SERVE STATIC ASSETS WITH AN EFFICIENT CACHE POLICY

Serving static assets with an efficient cache policy can greatly improve performance. Techniques include:

Cache-Control header: Specifying how long the browser should cache assets.

ETag header: Validating the cache using unique identifiers.

Expires header: Specifying a date after which cached assets are stale.

By implementing these strategies, web developers can enhance web application performance and user experience.