It is most often associated with front-end development.
Here are some of the tips for enhanced performance:
The result is that the website loads faster and provides a better user experience. The developer can also remove a library if that is included by mistake.
Avoid Memory Leakage
Use a Light Code
If the developer wishes to reduce the latency and enhance the speed of the code, then it is recommended that the developers use light and compact code.
Knowhow of Asynchronous Programming
The overall performance of the code may suffer because of the async feature. The idea is to use an asynchronous library that can revert to synchronous blocking calls. The developers must include asynchronous APIs inside their code.
Access Local Variables
It can access the variables with a local scope at a faster rate. The developer precedes each variable with a let or const for defining the current scope. This way, the developer improves the lookup and speeds up the code.
Improve Performance by Caching Object
The developer can achieve improved performance with the following two means:
- Use HTTP protocol cache
The developers use scripts for access to some objects. They improve the performance by using a variable that has a reference to that object or using a user-defined variable for the repeated access object.
Avoid Unwanted Loops
It is not a good practice for the developer to use a loop because that emphasizes the browser. The loop becomes faster with less work inside the loop. The developers often use efficient programming techniques for optimized code, such as putting the array length within a different variable and avoiding reading the length at each loop iteration.
Save Repetitive DOM items
DOM (Document Object Model) is an application API. It is used to define how a document is accessed and manipulated and how its logical structure looks.
The developer must minimize access to DOM. They can save the element's value in a local variable when the requirement is to read it several times. They can also decrease the DOM traversal trips. Moreover, one must avoid any memory leak when removing the DOM value by setting the variable value as "null".
The developer wants the page to load as soon as possible. But, they do not use all the functions in the initial loading of the page. Once the page loads initially, then the functions like clicking, changing tabs may occur.
Measure Performance with Tools
The performance of web pages can be best analyzed with a tool called Lighthouse. It allows us to audit SEO, best practices, performance and activities.
Use a tool like PageSpeed from Google for website improvements and performance optimization. The components can identify faults and make automatic adjustments based on the website's compliance with the best practices for Web Performance.
Moreover, you can collect metrics of the likes of CPU consumption by network simulation with the performance analysis of DevTools. It enables you to fix issues seamlessly. Otherwise, you can use More Tools from Chrome's main menu for measuring the CPU/memory usage of each tab.
Finally, performance at a granular level is measurable with the Node.js platform. Metrics can measure other performance issues and memory leaks as well.