🎯 YouTube CPU Tamer – Hybrid Edition (Improved)

🧩 Overview

This userscript dramatically reduces CPU usage on YouTube and YouTube Music. It dynamically switches between requestAnimationFrame and MutationObserver based on tab visibility to optimize the behavior of timer APIs like setTimeout. The script also intelligently handles YouTube's SPA (Single Page Application) transitions to ensure continued stability and avoid freezes.

• ⚙️ Hybrid trigger strategy: Automatically switches based on visibility state
• 🔄 SPA-aware repatching: Uses yt-navigate-finish events and DOM observation for automatic recovery
• 🧠 Minimum delay threshold: Prevents interference with critical player functions
• 🧼 Native timers from iframe: Ensures a clean and safe execution context

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🚀 How to Install

1. Install Violentmonkey or Tampermonkey in your browser
2. Add the script using the link below: 👉 Install this script

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📌 Supported Sites

• https://www.youtube.com/
• https://music.youtube.com/
• https://www.youtube.com/embed/
• https://www.youtube-nocookie.com/embed/

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🔍 Technical Highlights

• 🎛 Wraps setTimeout/setInterval with hybrid throttling logic
• 👁 Uses MutationObserver in background tabs to reduce unnecessary CPU cycles
• 🔧 Repatches after SPA navigation using DOM monitoring and timeout fallback
• 🧪 Preserves .toString() on patched functions to prevent detection
• 🧼 Utilizes native timers from sandboxed iframe to avoid contamination

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👨‍💻 Developer Notes

• Written in modern ES2020 JavaScript
• No pollution of global namespace
• Uses @inject-into: page for seamless integration with YouTube internals

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📜 License

MIT License You are free to use, modify, and redistribute this script at your own risk.

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🎥 Enjoy a smoother YouTube experience with a quieter CPU.