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1. Optimizing Total Blocking time
Total Blocking Time (TBT) is a load responsiveness metric that measures the usability of the web page during the loading. Total Blocking Time is an important user-centric performance metric that compares the time amount of non-responsive and responsive time during the rendering phase of the web page.
1.1 Identification LCP
Tools like Page speed insights,GTMetrix,lighthouse.
1.2 TBT Audits Tool
- Reduce the impact of third party code
- Minimize main-thread work
- Reduce Javascript execution time
- Avoid an executive DOM size
- Avoid long main thread tasks
- Defer non-critical CSS and Javascript
- Use code-splitting for reducing the Javascript Payloads
Note: If TBT is optimized, load-responsiveness will be better and First Input Delay.
