How can you increase the performance of your JavaScript app?

When you develop an app, performance is a vital concern. Every software developer needs to monitor as well as improve performance in each layer of the app. Starting from the database till server-side language, you will find many chances to arise performance issues and remember that the front end is not an exception. 

Tips to make JavaScript faster

Get unused codes removed: One of the assured ways of improving the performance of JavaScript is only to have less of it. Delete any unused JavaScript code. If it is detected that any given function has become obsolete, simply remove it. By getting rid of it, download time will be improved as the size of the file will get reduced. Moreover, the browser will be taking reduced time for analyzing the code. 

Minimize the code: Remove unnecessary non-codes present in JavaScript files that is you should get rid of the typical source code file in JavaScript as well as any language that includes things such as comments, indentation, white line and spaces that do not mean anything to developers and also somewhat useless to machine too. Such items are essential for making codes easily readable and to navigate. When interpreting or compiling codes, these are only useless bytes. So make use of a process named minification that will remove each and very useless characters described from the source code to create a smaller file.  Thus, programmers will be benefited from these as well as get them removed before the codes reach production, as well as the performance of the app, which will also be improved. 

Turn to HTTP/2: You need to make use of HTTP/2 and not HTTP/1.1. It makes use of multiplexing and it means that several requests are simultaneously sent. HTTP/1.1 needed that each of the requests gets finished before the next one is started. This as well as other improvements in the HTTP version will be improving the performance of the site. 

Utilize Gzip compression: Just think that if rather than sending any big file to a browser, the web server is able to send some zipped file for making it lighter. Thus, the browser can complete the file’s download very soon. Once the browser receives this compressed file, the document can be extracted and usually used. Gzip is an app that is used to compress files and many web servers support it. When a server is configured properly for serving compressed content, it will compress the response before it is sent to the browser. Gzip can be used to not only compress JavaScript files but also HTML as well as CSS. Finally, the performance of the app will be improved. 

Hold uploading of unwanted JavaScript: Anything that is not required for the starting page load can be delayed from loading. Every function is not required when the page loads first. For instance, you can hold uploading functions needing users to perform some provided action. If you avoid JavaScript code from getting loaded, it will be only delaying the page’s initial load as well as display. After the page is loaded on the browser, other functionality pieces can be loaded in order to keep them ready when a user requires them. So break your JavaScript into small files and load them as required. 

Final words:

Nowadays, a huge portion of the applications that are developed are web apps. As JavaScript is known to be the web’s language, it explains that optimizing the performance of JavaScript is an attempt worthwhile. Remember that the latest JavaScript trends performance runs parallel with the performance of a web and thus you can improve it accordingly.

About RJ Frometa

Head Honcho, Editor in Chief and writer here on VENTS. I don't like walking on the beach, but I love playing the guitar and geeking out about music. I am also a movie maniac and 6 hours sleeper.

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