Minimize Main Thread Work

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Quick Reference

Element Code: PE-022

Issue: Heavy main thread work

Impact: Unresponsive page

Fix: Reduce JS execution

Detection: Lighthouse

What Is This Issue?

Main thread blocking hurts interactivity.

Why This Matters

Affects Core Web Vitals.

How to Fix

  1. Code split
  2. Use workers

Tools

  • Lighthouse: Main thread audit

TL;DR

Reduce JavaScript execution by splitting code and using workers.

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