NOTICE: By continued use of this site you understand and agree to the binding Π£ΡΠ»ΠΎΠ²ΠΈΡ Π·Π° ΠΏΠΎΠ»Π·Π²Π°Π½Π΅ and ΠΠΎΠ»ΠΈΡΠΈΠΊΠ° Π·Π° ΠΏΠΎΠ²Π΅ΡΠΈΡΠ΅Π»Π½ΠΎΡΡ.
Install steps: Install a userscript manager, select Install, then open a website matched by the script.
Userscript HOWTO Π·Π° Π½Π°ΡΠΈΠ½Π°Π΅ΡΠΈ Chrome Edge Firefox
The following figures come from the original source and are separate from activity on this site.
Original script: π§ X.com ι«ηΊ§ JavaScript δΌεε¨+
Source version: 1.3.9
Last source check:
Last successful check:
Requests received by this site are not proof that a user completed installation.
Clicking Install records a request on this site; it does not confirm installation. Not working after install? View troubleshooting and issues
X.com Heavy JS Optimizer+ is a high-performance userscript that dramatically reduces lag, scroll jank, and CPU load on X.com (Twitter).
It intelligently removes redundant animations, limits repainting, pauses offscreen videos, and caps JavaScript frame rates β all without breaking the core site experience.
π§Ή Lightweight CSS Cleanup
Removes heavy effects (backdrop-filter, blur, gradients) and disables GPU-stressing layers.
βοΈ Passive Event Optimization
Forces passive: true on scroll/touch listeners for smoother rendering.
ποΈ Smart Video Control
β’ Only one video can play at a time
β’ Auto-pause when scrolled offscreen
β’ Prevents auto-play and decoding spam
π§© DOM Feed Garbage Collector
Keeps only the last N tweets in the DOM to prevent memory bloat.
(Configurable from userscript menu.)
π Metrics Blocking (Optional)
Blocks unnecessary telemetry calls like scribe, engagement, and client_event.
β‘ Aggressive Runtime Mode
Auto-detects long tasks and dynamically limits FPS (requestAnimationFrame) to maintain stability.
π€ Tab Visibility Safety
Auto-pauses all videos when tab is hidden.
Available via ViolentMonkey / TamperMonkey menu:
| Scenario | Before | After | Improvement |
|---|---|---|---|
| Scrolling feed 100+ tweets | ~48β55 FPS | 90+ FPS | +85% |
| Memory footprint (avg) | 1.4 GB | 650 MB | β53% |
| CPU load (video active) | 45β60% | 25β30% | β50% |
(Tested on Brave 1.72 / Win10 / Ryzen 7 5800H)
β Works on:
π§© Supported managers:
Developed by Oppai1442
Made with β€οΈ, caffeine, and a stubborn hatred of lag
If you encounter any issues, please leave feedback β Iβll fix them as soon as possible.
License: MIT
View source on GreasyFork
β οΈ Disclaimer:
This script modifies rendering behavior for optimization purposes.
Use at your own discretion β functionality on experimental browsers may vary.
Π Π΅ΠΉΡΠΈΠ½Π³: 0