After the May 12th stable update my GNOME desktop’s animations began to noticeably stutter and drop frames. The problems seem to stem from the latest update to
Someone on the Arch forums made a patch to revert the offending code to its previous state. Instructions to apply the patch can be found here: https://bbs.archlinux.org/viewtopic.php?pid=1707028#p1707028
The patch completely resolved the stuttering and frame rate drops on my system. This is only a temporary solution. Hopefully the underlying issue will be resolved soon by the upstream devs.