Various Tips for Improving JavaScript Performance

Over the past five years, JavaScript has appeared among next-generation developers as the leading scripting language. Through browsers, apps, blogs, operating systems, and even robots, JavaScript is everywhere. Given the ever-growing prevalence of JavaScript in the domains of web and mobile app development growth, staying updated with the current and with the best coding standards is vital for JavaScript developers. Therefore, badly written JavaScript will render it impossible for all customers to maintain a consistent experience.


Problems that decrease JavaScript performance

  • Too many interactions with host – Any interaction with the host entity, or the user’s device, results in unpredictability and leads to the performance lag.
  • Too many dependencies – If your JavaScript dependencies are plentiful and badly handled then the performance of your application would fail.
  • Poor event handling – Proper usage of event handlers can increase efficiency by growing the size of the request stack; but, without the knowledge, they will execute constantly if you don’t keep track of these. Using them carefully and sparingly.
  • Inefficient iterations – Since iteration requires so much computing time, they provide a perfect starting point to refine the application. Removing redundant loops or calls inside loops would speed up the output of JavaScript.
  • Unorganized code – Lack of structure in your code will contribute to poor resource allocation.


Various tips to improve JavaScript performance:

  • Learn asynchronous programming – Sometimes, the application may include several internal calls to specific APIs to obtain data. One way to solve this will be for separate middleware to be needed for each feature. JavaScript is single-threaded, so loads of synchronous elements will theoretically lock the whole program. JavaScript is gratefully doing a decent job of managing asynchronous programming with a function named async.js.
  • Pass local variable – When JavaScript determines the variables locally as far as possible to reduce the time the engine requires to check for globally; this best practice would improve the overall development rate.
  • Keep the codes light and small – To maintain the mobile app’s high efficiency, you must keep the code as light and compact as possible. Holding codes tiny and light will lower latency and improve efficiency.
  • Avoid unwanted loops – The opinion is that so much looping is not a positive idea in JavaScript and simply places an unwanted burden on the browser.
  • Keep DOM access to the minimum – Within the JavaScript native environment, interacting with host domain objects (DOM) contributes to unpredictability and substantial output latency, because the client needs to be updated each time. So, the common advice on this is to limit DOM exposure.



So, in this article, we tried to provide you with various possible tips that can improve JavaScript performance and help you to provide superior JavaScript development services. The description of the tips above should provide a very slight boost to results. When they are all applied together, though, you can see a significant increase in the speeds of the site creation and applications with JavaScript. We at softieons technology work according to our customer’s needs.