Typical js performance challenges
Poor quality event handling:
It is important to keep track of all Event Handlers so that the handlers do not perform without your knowledge.
The minute subset of lexical constructs allow developers to achieve a lot. However, an absence of organization in the code can lead to insufficient resource allocation.
Too many dependencies
For example, mobile users with restricted bandwidth will need to wait longer for rendered objects.
Tips for js performance optimization
Trimming the HTML
When you cut the app’s HTML in half, it is possible to double the DOM speed. This can be challenging, but it is possible by discarding the tags like <div> and <span>.
Batching the DOM changes
Batch up DOM transformations to prevent recurring screen renderings. When creating style changes, make all the alterations at once instead of applying changes to each style individually.
Learning the methods of asynchronous programming
Async code does not block the thread. Instead, the threat gets rammed to the event queue, which fires after the execution of other codes.
Utilizing gzip compression
HTTP/2 utilizes multiplexing and enables sending multiple responses and requests simultaneously. Buffering the DOM
If there are scrollable DIVs, it is possible to employ a buffer to get rid of DOM items that are not currently visible in the viewport. These techniques save both DOM traversal and memory usage.
Restrict library dependencies
Loading times can affect library dependencies so it is important to keep the utilization to a minimum.
The best way to get ride of external library dependencies is to depend on in-browser technology.
When using CSS selectors, utilize Sizzle.js instead of jQuery. When libraries are comprising a single feature, it is vital to add CSS selectors separately.
Keeping codes light and small
- Is there a real requirement for this module?
- What is the reason for utilizing this framework?
- Is the overhead worth it?
- Is there a simpler way of doing this?
Implementing Application Performance Management Tools for js Performance:
RUM includes resource breakdowns. Resource breakdowns help you identify if images need to be optimized or stylesheets and scripts need to be minified or cached. RUM’s segmentation functionality allows for deeper insights. Use segmentation to monitor load times based on browser, geography, and device type. This makes it easy to identify opportunities to improve the overall experience by pinpointing optimal locations for CDNs. Try your free, 14 day Retrace RUM trial today.