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通过隐式的异步调度延迟减少浏览器的能耗
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Reduce your browser’s energy usage and CPU load by adding smart, invisible delays to script execution.
Web CPU Tamer introduces a lightweight, intelligent delay into the browser's task scheduling system. By doing so, it prevents web pages from overwhelming your CPU with tightly packed timers and animations — all without breaking any functionality.
This leads to:
This script replaces the browser’s built-in scheduling functions with optimized versions:
| Original | What it does |
|---|---|
setTimeout / setInterval |
Adds two micro-delays before each execution using queueMicrotask and MutationObserver. This lets the browser handle layout and paint cycles more gracefully. |
requestAnimationFrame |
Adds a subtle delay by measuring the time difference across animation frames and yielding execution until the browser is ready. |
clearTimeout / clearInterval / cancelAnimationFrame |
Fully respected and properly tracked, so cancelling still works perfectly. |
Under the hood, these replacements insert a two-stage implicit delay around scheduled tasks — just enough for the browser to breathe without making apps feel sluggish.
This script runs on all http:// and https:// pages, except direct links to file types like images or logs:
.txt, .png, .jpg, .jpeg, .gif, .xml, .svg, .manifest, .log, .ini
That means no interference with direct downloads, image views, or text-only pages.
| Browser | Status |
|---|---|
| Chrome / Chromium | ✅ Full support |
| Firefox | ✅ Full support |
| Edge | ✅ Full support |
| Brave | ✅ Special handling for YouTube |
| Safari | ⚠️ Mostly works, limited mutation timing accuracy |
Also works with:
CY Fung
🔗 GitHub Support Page
MIT License
You are free to use, modify, and redistribute.