🧠 X.com Heavy JS Optimizer+ — Changelog

v1.3.1-pre (2025-10-23)

Fixes & Stability

• Fixed critical TypeError: root.querySelectorAll is not a function caused when onReady() fired before the DOM was available.
• Added safety guards for both scanVideos() and scanImg() to prevent crashes on non-Element nodes.
• Ensured first DOM scan is triggered correctly using onReady() (no more skipped optimization for initial videos/images).
• Improved overall stability on browsers with aggressive preload or delayed DOM construction.

Performance Enhancements

• Maintained @run-at document-start for maximum patch coverage (fetch, rAF, and setInterval hooks initialize early).
• Added lightweight checks to reduce redundant MutationObserver calls.
• Optimized early CSS injection timing for faster compositor cleanup.

Behavior Improvements

• Video & image optimization now runs both:
  • Once after DOM ready (onReady).
  • Continuously via live MutationObserver for new tweets.
• Prevented double-injection and redundant event listeners.

Developer Notes

• This version is functionally identical to v1.3.0, but much safer and crash-free.
• Considered stable for daily use.
• Future builds will focus on:
  • Live FPS/Memory overlay (performance HUD).
  • Smart DOM cleanup (auto remove old tweets after 10+ minutes).

v1.3.0 (Initial Public Release)

Core Features

• Full optimization suite for X.com/Twitter:
  • Removes heavy CSS (blur, backdrop-filter, linear-gradient).
  • Forces content-visibility: auto on feed articles for massive paint savings.
  • Caps frame rate to ~45 FPS during long tasks (Aggressive Mode).
  • Pauses offscreen videos and enforces single active video decoding.
  • Auto-lazy-loads and async-decodes all images.
  • Optionally blocks analytics (scribe, metrics, client_event, etc.).
• User menu (GM_registerMenuCommand) to toggle:
  • Aggressive Mode ON/OFF
  • DOM feed limit
  • Analytics blocking

Adaptive Runtime

• Auto-detects browser long tasks via PerformanceObserver.
• Dynamically enables “Aggressive” or “Ultra” mode when lag spikes.
• Reduces setInterval density to lighten CPU usage.

Author

Oppai1442
GreasyFork Profile

License: MIT