- The main reason behind the performance lag is the interaction with the host or the browser.
- There are too many poorly managed dependencies.
- Another reason on the list is poor event handling
- Inefficient iterations or unnecessary loops that take up too much time.
Learn Asynchronous Programming
To fetch data, your application performs multiple internal calls to various APIs. Each function requires a different medium to handle the process.
It will help in reducing the transmission time and the time required by the browser to analyse and compile the code.
- Remove the libraries that were launched by mistake or no-longer needed in latest update.
- Remove the event listener and the element it is attached to.
- Remove all the unwanted comments, semi-colons, white spaces, etc.
Compress Your Files
For those who do not know about Gzip, it is a data compression algorithm used to compress and decompress files. It is a fast and easy way to improve page speed performance while still delivering a high-quality experience to the users.
Cache in the Browser
Reduce the DOM
What is common between websites like Facebook, Twitter, Instagram, LinkedIn and more? The fact is that they have an infinite scrolling feature available to users.
Due to this infinite scrolling, the more the dynamic content is added to the DOM (Document Object Model), the more elements you have for the query.
DOM is an application programming interface that is used to define the logical structure of documents. It is used to determine the way the documents are accessed and manipulated. Accessing variables in DOM consumes a lot of time. It impacts the browser’s performance as it consumes memory.
Eradicate Memory Leak
It is due to memory leaks. A memory leak is when a piece of memory which is no longer required is needlessly occupied by the application.
These leaks are the result of neglect in memory management by developers because of the misconception about automatic memory allocation.
The failure to deal with this memory leak degrades the performance of your application and can even leave it in an unusable state.
Establish a Better Testing Environment
As a developer, it is your responsibility to test all the applications before they go live. We know that testing codes diligently requires a set of good tools.
Code minification is useful for removing all the unnecessary elements from the source code. This creates smaller-size files and faster loading times.
Some of the top tools or environments that developers should use are Google Closure Compiler, Packer, Dojo Shrink Safe, YUI Compressor and more.
Therefore, establish a well-defined testing environment to prevent your application from suffering from poor performance.
Give Access to Local Variables
Make sure to specify the function scope of the variable by adding let or const as a prefix with each variable. This will help in preventing code lock-up and speeding up the process.