Lightning Components Performance Best Practices

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Optimizing the performance of Lightning components is crucial for delivering fast and responsive user experiences in Salesforce applications. 

Here are some best practices to improve the performance of Lightning components:

Use minified versions of libraries and style sheets

Use a content delivery network (CDN)

Enable browser caching

Use smaller image files

CDN and Browser Caching wherever possible is a given. 

Cloudflare CDN was used. Akamai is another common option. this is a must-have

Custom Fonts (TTF files) were used from Google in the site implementation which was surprisingly taking a long time for browsers to download and use. So we moved to standard fonts which increased the score significantly. If you absolutely need to use Custom Fonts, then there are options in the community to preload this custom font as a static resource which loads faster compared to the Google Reference\

The CSS file was heavily optimized and instead of using images, we used CSS styles for some of the rendering Images.

From a score perspective, the Page Load event plays a big part. So even if there is some dynamic content, we loaded the page first and fired async code in lightning to load the dynamic content separately after the page load


Here are a Salesforce few links you can refer to, based on my experience.

Lightning Components Performance Best Practices

Technical Requirements and Performance Best Practices

5 Ways To Make Your Lightning Community Even Faster

Analyze and Improve Experience Builder Site Performance

Improve Experience Cloud Site Performance

How scalable is Salesforce?

Do I see a degradation in performance as Salesforce's subscriber base grows?


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