A YouTube userscript titled to reduce memory use by reusing components; the listing gives no additional implementation detail.

greasyfork.org/en/scripts/521342
YT RM3 homepage screenshot

About YT RM3

YT RM3 is a YouTube userscript that aims to reduce browser memory use by reusing page components. It runs on youtube.com and currently works mostly on chatroom elements. Support for other parts of the site is described as under review.

The script must be installed through a user script manager extension, such as Tampermonkey, Greasemonkey, Violentmonkey, or Userscripts. The listing includes a test procedure that uses DevTools Performance recording to compare memory use in a live chat, but it does not report measured memory results.

Key features

  • Reuses page components to reduce memory use on YouTube
  • Currently focuses on YouTube live chatroom elements
  • Runs on youtube.com as a userscript
  • Includes a test method using DevTools Performance recording
Best for: YouTube users who follow live chat in a browser with a user script manager installed and want to reduce memory use.
Good for
  • Targets a specific problem, memory use on YouTube, with a clear purpose
  • Includes a documented test method for checking memory use in live chat
Watch out for
  • Support currently covers mostly chatroom elements, and further support is under review
  • Requires a separate user script manager extension to install
  • The listing does not include measured memory results

YT RM3 at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
iOS, Web
Open source
Not stated
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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YT RM3 FAQ

Do I need an extra program to use this script?
Yes. The script must be installed with a user script manager extension, such as Tampermonkey, Greasemonkey, Violentmonkey, or Userscripts.
Which parts of YouTube does it cover?
It works mostly on chatroom elements. Support for other parts of YouTube is described as under review.
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