Atom minify multiple js files3/19/2024 ![]() You forget to version your assets, so if you publish a new version, the browser will not use the cache So, the browser can use the cache to load the page: On this website, the second visit to a page is very fast because you only get a 304 (Not Modified) response from the server. There are some headers to send to the client when you send the files: Indeed, downloading the same files every time you visit a page is a waste of time and bandwidth. The Content-Encoding should display br or gzip:Ĭheck the response compression is enabled using Developer Tools #Add caching informationĬaching static files such as CSS and JS files is essentials to improve the performance of your application. You can check the server is well configured using the Developer tools ( to show to Content-Encoding column, right-click on the header and check Response Headers/Content-Encoding). It will consume CPU resources for nothing because it won't reduce the size of the file. For instance, jpeg or png images are already compressed and it will just be a waste of time to recompress them. You must not compress resources that are already compressed using another way. However, you may also need to support older algorithms such as deflate and gzip for older clients. Brotli is well supported by recent browsers ( 85% of all users ). There are multiple compression algorithms with different characteristics. The easiest way to reduce the size of the response is to compress it. The smaller the response, the faster it is to send it to the client. The Illustrated TLS 1.2 Connection #Compress responses using Brotli or gzip.Adding a free SSL certificate to a website hosted on nginx using Let's Encrypt.Making the Internet Safer and Faster With TLS 1.3.You can easily check the server is well configured using the free service provided by Qualys : With 1.3, it requires only one round-trip, which in turn cuts the encryption latency in half.ĭepending on the server you use the procedure to enable TLS1.3 is different: To put it simply, with TLS 1.2, two round-trips have been needed to complete the TLS handshake. The latest version of TLS, 1.3, provides more security but also better performance than its predecessors. If you use HTTPS, you should consider using the latest version of TLS. What HTTP/2 Means for Frontend Development #Enable TLS 1.3.The Protocol should display h2 when HTTP/2 is used:Ĭheck HTTP/2 is enabled in the Developer Tools You can easily check the server is well configured using the Developer tools ( to show to Protocol column, right-click on the header and check Protocol). There are some cases where HTTP/2 is not enabled as explained in the documentation such as non-TLS connections or Windows authentication IIS supports HTTP/2 since Windows 10 and Windows Server 2016.It allows the server to send JavaScript or CSS files to the client with the page, before the client parsed the page and request these files.ĭepending on the server you use the procedure to enable HTTP/2 is different: HTTP/2 Server Push allows the server to send resources to the client before the client requests them.This enables clients to make many requests in their first packets on a connection, while TCP flow control windows are still small. Compression helps to multiplex, because requests are smaller. Data compression of HTTP headers allows reducing the payload size (HPACK). ![]() ![]() This fix the head-of-line blocking problem in HTTP 1.x. The responses may come back in any order. Each HTTP request over the TCP connection may be made immediately without waiting for the previous response to come back. Multiplexing multiple requests over a single TCP connection.HTTP/2 is supported by all major browsers ( source ). ![]() HTTP/2 is an evolution of HTTP/1 which comes with new features to improve page load speed in web browsers.
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