MarsSeed [1] filed a deletion request for mutter-dynamic-buffering [2]: This build's MR#1441 patch, originally submitted to upstream in September 2020, has finally landed not long ago in upstream's main branch [a], and in their stable 48.0 and 48.1 releases [b].
(Upon opening the latter link [b] that shows commit 9a39a0ce, please click on the "Tags containing commit" toggle to reveal the git tags that incorporate the changes in this commit.) Arch/extra/mutter is on the latest version [c] and now has the dynamic buffering feature. [a]: http://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1441 [b]: http://gitlab.gnome.org/GNOME/mutter/-/commit/9a39a0ce [c]: https://archlinux.org/packages/?q=mutter [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mutter-dynamic-buffering/