WordPress fix guide
High Total Blocking Time (TBT) on WordPress
Page is unresponsive during loading due to heavy JavaScript.
Issue ID: PERF-TBT-001Severity: majorEffort: L
Why this matters
Page is unresponsive during loading due to heavy JavaScript. This affects load speed, Core Web Vitals, and how many visitors stay long enough to convert.
WordPress fix path
How to fix this on WordPress
Focus on hosting, caching, images, and plugin weight.
- 1Compress media and use properly sized images.
- 2Enable page caching and a CDN.
- 3Remove heavy plugins or scripts that block rendering.
After you fix it
- ✓Run Lighthouse and confirm TBT < 300ms
Same fix, other platforms
Fix high total blocking time (tbt) on a different CMS
Other fixes
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