performance

TBT Too High

Total Blocking Time.*exceeded.*(?:200|600)ms

Fixes

1.Split long JavaScript tasks with requestIdleCallback
2.Remove unused JavaScript with tree shaking
3.Defer parsing of non-critical scripts

performancetbtmain-thread

Related Errors

performance3 fixes

LCP Too Slow

Largest Contentful Paint.*exceeded.*(?:2500|4000)ms

•Preload critical images and fonts
•Optimize server response time (TTFB)

performance3 fixes

CLS Too High

Cumulative Layout Shift.*(?:0\.1|0\.25).*exceeded

•Add width/height attributes to images and videos
•Reserve space for dynamic content with aspect-ratio

performance3 fixes

TTI Too Slow

Time to Interactive.*exceeded.*(?:3800|7300)ms

•Code-split and lazy load non-critical JavaScript
•Reduce main thread blocking time