I'm not sure the flame graph of the locally built tmux captures the same thing. In any case, zooming/dezooming causes a grid reflow which basically reallocates the entire grid of rows shown on screen. If you have a sufficiently large window, it can be slow.
In this specific instance it would seem that for the packaged tmux, the AVX implementation of memmove() is being used and it's unusually slow. Is AVX emulated in GCE? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2066914 Title: tmux 3.4 stalls during active pane zoom To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tmux/+bug/2066914/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs