![]() ![]() We used a personal theme and loaded it up with 4 JavaScript files and 3 CSS files.įirst we measured the time it took for this theme to load up when it had multiple file assets to load. ![]() HOW WE DID IT Separate Files Theme (Image Taken From One Test) Now the question is, if we combine JS and CSS files to reduce the amount of requests being made on page load, will we get a meaningful improvement in our load times?Īs you can see, the load speed of the theme actually gets slower when you combine the assets together. HTTPS/2 requires one TCP connection for each domain, but you’d ideally try to minimize the amount of new connections you’d have to make for each domain. Most apps you install will call a number of 3rd party resources. Browser compatibilityīrowser support for the HTTP/2 Protocol has been widely embraced, though some browsers don’t fully support it.īelow is an image taken from Lambda Test that details which of the major browsers support HTTP/2.ģrd party resources are inevitable when it comes to Shopify. You should try to keep the number of files served by one URL under 50 for the best results. The amount of files that you can serve through HTTP/2 from a single URL will depend on the codebase and server. This improved performance since you’d only be hindered by the longest file load time. Instead of each file being downloaded one at a time, all of the files were downloading at the same time. HTTP/2 solved this bottleneck by sending multiple requests for data in parallel, all within a single TCP connection. Even worse, you would have to wait for each file to finish downloading before moving onto the next. In HTTP/1.x, web files would be downloaded synchronously from a server, meaning that you’d have to make several calls to load up a page. The HTTP/2 protocol was released a few years ago, which changed the way the web downloads files from servers. ![]() In 2020 however, is combining files to reduce request calls a valid optimization method? Combining CSS and JS files has historically been a popular method of improving a website’s performance.īy concatenating all of your files into one asset, you minimize the amount of calls that are being made to retrieve these assets from the web server. ![]()
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