1. Learn asynchronous programming-
The most ideal approach to handle this is to consistently use asynchronous APIs in your code. In any case, you should always remember that understanding the complexities of async programming is often challenging for the novices.
2. Avoid using global variables-
Since the scripting engine needs to look through the scope while referencing global variables from within function or another scope, the variable will be destroyed when the local scope is lost. If variables in the global scope can not continue through the lifetime of the script, the performance will be improved.
3. Keep codes light and small-
To maintain the high performance of mobile applications, it’s better to keep the code light and also reduced. Keeping codes light and small would decrease the latency and boost up the speed. While you’re in a development stage, you should ask yourself these questions below.
- Do I really need this module?
- Can I do this in a simpler manner?
- Why am I using this framework?
- Is this worth the overhead?
4. Cache in the browser-
5. Avoid using too much memory-
6. Minimize DOM access-
8. Use web workers when you need to execute code that needs a lot of execution time-
According to the Mozilla Developers Network (MDN) documentation: “Web Workers makes it possible to run a script operation in a background thread separate from the main execution thread of a web application. The benefit of this is that laborious processing can be performed in a different thread, allowing the main (usually the UI) thread to run without being blocked/slowed down.”
Web workers allow your code to perform processor-intensive calculations without blocking the UI thread. Web Workers allow you to bring forth new threads and delegate work to these threads for efficient performance. This way, long running tasks which would typically block other tasks are passed off to a worker and the main thread can run without being blocked.
9. Eliminate memory leaks-
In case of a memory leak, the loaded page will use more memory and eventually occupy all the available memory in the device. This would impact the general performance adversely. You might be familiar with this type of failure that occurs on a page with an image slide.
There are tools that analyse whether your website is leaking memory or not. Chrome Dev Tools is one of such tools which records the timeline in the performance tab. Normally, the pieces of the removed DOM from the page are liable for memory leaks because they have some variable which is responsible for reference which prevents the garbage collector from eliminating them.
10. Event Delegation implementation-
Event Delegation makes it simpler to use a single event handler which eventually helps in proficient management of a type of event for the whole page. Without Event Delegation, large web applications can stop because of the presence of some event handlers. Event Delegation accompanies numerous advantages, for example, less functionality to manage, less memory required to process, and less ties among DOM and code.