- Multiple Loads of Interactions with the Host
Any interaction with the host object or the browser of the user increases unpredictability and contributes to the lag in performance. This issue often appears as a slow rendering of objects from DOM. Of course, you can’t avoid such interactions, but you can minimize them. Learn more about what can help block the DOM and how it can be fixed.
- Multiple Dependencies
- Lack of Event Handling
Proper use of event handlers can improve performance by decreasing the depth of your call stack; however, without your knowledge, if you do not keep track of them, they can run repeatedly. It is recommended to utilize them wisely and sparingly.
- Inefficient Iterations
- Unorganized Coding
- Avoid Using Too Much Memory
- Learn Asynchronous Programming
- Define Variables Locally
Local variable:–Variables defined on their own
International variable:–Variables used in the whole text
The browser does an operation that is called a scope lookup at the time you call a feature. There is also an increase in the amount of time taken to access variables outside the current scope with the increase in the number of scopes in the scope chain.
That’s why it takes more time for an engine to access a global variable than a local variable. This means that if you define most variables locally, the time required by the engine to search for them will decrease rapidly. It will therefore improve the application’s overall speed.
- Cache in The Browser
Scripts are commonly used to access an entity. By storing a repeated access object within a user-defined variable can help to achieve quality enhancement and using a variable in consecutive references to that object.
- Avoid Using Global Variables
Because when referring global variables from within feature or another context, the scripting engine needs to look through the scope, the variable will be destroyed when the local scope is lost. Unless global range variables cannot exist throughout the script’s lifespan, the output will be improved.
- GZip Compression
- Keep Codes Light And Small
It is essential to keep the software as light and compact as possible in order to maintain the high performance of mobile applications. Holding small and light codes will lower latency and increase speed.
- Use Tools To Detect Problems
Lighthouse is a good web-based management tool that helps you reviews results, usability, best practices, and SEO. Google Page Speed is designed to help developers understand the performance optimizations and potential enhancement areas of a website. With Google’s Best practices, the components were designed and able to find out the faults in Web compliance by automating the adjustment process.
- Event Delegation Implementation
Event Delegation makes it easier to use a single event handler that eventually helps the entire page to effectively manage a type of event. Because of the presence of several event handlers, large web applications can stop in the absence of Event Delegation. Event Delegation comes with many advantages such as: less management features, less processing power needed, and fewer DOM-code links.
- Avoid Unwanted Loops
- Minimize DOM Access
- Boost Performance By Caching Object
- Specify The Execution Context
- Eliminate memory leaks
The loaded page will use more and more memory in case of a memory leak and eventually occupy all the memory available in the device. This would successfully prevent affecting the overall results. This type of failure that occurs on a page with an image slide may be familiar to you.
There are tools to evaluate if memory leaks from your website. One such tool that tracks the timeline in the output section is Chrome Developer Tools. The pieces of the removed DOM from the page are usually responsible for memory leaks because they have some variable that is responsible for the reference that causes the garbage collector to remove them.
- Throttle and Debounce
- Google Closure Compiler
Google Closure Compiler also double-checks your syntax and variable references in addition to analyzing, parsing and rewriting your code for optimal performance.
To condense your code in seconds, paste your code into Packer and press’ Pack.’ Packer also offers decompression on – the fly.
- Dojo ShrinkSafe
- YUI Compressor
YUI Compressor is a Yahoo-created command-line tool that delivers a higher compression ratio than most of its competitors. Here CSS files have compressed with the help of YUI compressor and applications, different code compression tools may be better suited.