high cpu usage after update to MacVim r179 (Vim 9.1.0)

[nico]

Steps to reproduce

1. Update to MacVim r179 (Vim 9.1.0)
2. Use it

Expected behaviour

Fairly low CPU usage.

Version of Vim and architecture

MacVim r179 (Vim 9.1.0), arm64

Environment

Operating system: macOS 13.5.2 (22G91)
Arch: arm64

How MacVim was installed

downloaded from github, auto-updated via sparkle

Logs and stack traces

I'll attach a sample taking in Activity Monitor.

I only have 6 windows open. Usually I have way more, and CPU usage is negligible. Now it hovers at around 12%.

I use very few plugins.

Vim configuration where issue is reproducable

No response

Issue has been tested with given configuration

• by running MacVim.app from GUI macOS interface
• by running vim/gvim/etc installed by MacVim
• by running other versions of vim (e.g. /usr/bin/vim)

Issue has been tested with no configuration

• by running mvim --clean (or gvim, supplied by MacVim distribution)
• by running vim --clean (in terminal, supplied by MacVim distribution)
• by running vim --clean (in terminal, other suppliers, e.g. /usr/bin/vim)

Other conditions

• The both Homebrew packages "vim" and "macvim" are installed

[nico]

Sample:

macvim.txt

[ychin]

Hmm that's not good, let me take a look. Just for context can you tell me the plugins you have installed? And have you run with --clean (r179 has a new menu item to do this)? Or is this too intermittent for that?

[nico]

I haven't seen it yet after restarting.

% ls ~/.vim/plugin 
NERD_commenter.vim	surround.vim

% ls ~/.vim/pack/plugins/start 
dash.vim	fugitive	gn		llvm

[ychin]

If you see it again, can you post it here? I'll keep this issue for a while for now.

Sometimes there are issues with stale Vim processes that crashed leading to a railed CPU (see #1423). This doesn't seem like it but I can't think of anything else.

Also, are you sure it was MacVim process going ham on the CPU, or was it the hosted Vim processes?

[nico]

Just happened again (i.e. it happens only rarely).

Sample of MacVim.txt

Yes, it's the MacVim process: