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Google PageSpeed Insights recommends under ms for server response time. If you are in the ms range, this is pretty standard. In general, a page load should only be blocked on critical CSS. Each external stylesheet must be downloaded from the network. These extra network trips can significantly increase the time that users must wait before they see any content on their screens.

The Definitive Guide to HTML5 Video - Silvia Pfeiffer - Google Books

Once the HTML is downloaded, a browser has everything that it needs in order to display the page. Remove any inline style blocks containing CSS that is not used by the current page. If your site uses external CSS files shared among multiple pages, consider splitting them into smaller files containing rules for specific pages. For font rendering, need to specify the font-display descriptor, most browsers currently have a default strategy similar to block. Having an excessive DOM size will affect page loading time. No parent node with more than 60 child nodes.

Minify javascript code for smaller file sizes. HTTP caching can speed up your page load time on repeat visits. Each and every topic list below needs optimization to reduce the load time of the page. CRP enables the browser to load a page as quickly as possible by prioritizing which resources get loaded and the order in which they load.

Contact a seo specialist for betterment of your site. Minimizing the number of critical resources: eliminating them, deferring their download, marking them as async, and so on. Optimizing the number of critical bytes to reduce the download time number of roundtrips. Optimizing the order in which the remaining critical resources are loaded: downloading all critical assets as early as possible to shorten the critical path length.

Render-blocking resources are one of the most common reasons for slow loading websites.


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For stylesheets, consider splitting up your styles into different files, organized by a media query, and then adding a media attribute to each stylesheet link. For critical scripts, consider inlining them in your HTML. For non-critical scripts, consider marking them with the async or defer attributes.

Load Javascript asynchronously or use defer parsing method. Reducing the total size of network requests speeds up page load time and help in page ranking. Reduce the size of the requests to reduce your total payload size. Optimize requests to be as small as possible. Set the compression level of JPEG images to Preconnect allows the browser to set up early connections before an HTTP request is actually sent to the server. This, in turn, eliminates roundtrip latency and saves time for users.

This can eliminate many costly roundtrips from your request path — in some cases reducing the request latency by hundreds and even thousands of milliseconds. A preconnect can be added directly to a link tag as an attribute in the HTML.


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WebP is supported in Chrome and Opera and provides better lossy and lossless compression for images on the web. They produce much smaller image files so you can greatly improve your pages speed by using next-gen formats. The current browser support for each next-gen format:.

Anything larger than that just results in wasted bytes and slows down page load time. With responsive images, you generate multiple versions of each image and then specify which version to use in your HTML or CSS using media queries, viewport dimensions, and so on. Use vector-based image formats, like SVG. With a finite amount of code, an SVG image can scale to any size. Tools like gulp-responsive can help automate the process of converting an image into multiple formats. Offscreen images are images that appear below the fold. Deferring the load of offscreen images can speed up page load time and time to interactive.


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  5. Only download above-the-fold images during the initial request. Text compression minimizes the byte size of network responses that include text content.

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    Fewer bytes downloaded means faster page loads. When a browser requests a resource, it lists what text compression encodings it supports in the accept-encoding request header. All modern browsers do this. The server encodes the response in one of the formats that the browser supports and indicates which format is used in the content-encoding response header. Sorry, but we can't respond to individual comments. Recent searches Clear All. Update Location. If you want NextDay, we can save the other items for later.

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