MacVim（8.0.1633）运行3-4小时后变慢是否正常？

Hey there! Let me cut to the chase: this isn’t normal behavior for MacVim. If it runs smooth at startup but gets sluggish after 3-4 hours of continuous use, there’s almost certainly a fixable issue at play. Here are the most common causes and how to troubleshoot them:

• Plugin memory leaks: A lot of older or poorly optimized plugins can slowly hoard RAM over hours of use. Run :memory directly in MacVim to see which plugins are eating up the most memory. You can also temporarily disable plugins (rename your ~/.vim/plugins folder or comment out plugin lines in your .vimrc) one by one to pinpoint the culprit.
• Unoptimized syntax highlighting: Older Vimscript-based syntax highlighters can build up overhead when editing large files or keeping MacVim open for extended periods. Try turning off syntax highlighting temporarily with :set syntax=off—if the lag disappears, look into updating your syntax files or switching to a more efficient alternative (note: your older MacVim version might have limited support for Lua-based highlighters, so stick to updated Vimscript options).
• System resource crunches: If your Mac is low on physical RAM, MacVim might get swapped to slow virtual memory over time. Open Activity Monitor to check MacVim’s memory and CPU usage—if it’s spiking, close resource-heavy background apps (like browsers with dozens of tabs, video editors) to free up space.
• Version-specific bugs: MacVim 8.0.1633 is a fairly old release (circa 2018), and later versions fixed several memory leak issues. If you can, update to the latest stable MacVim build. If you need to stick with this version, try resetting your configuration by renaming ~/.vim and ~/.vimrc—corrupted settings can sometimes cause unexpected lag.

Start with the quickest checks first (closing other apps, disabling a few plugins) and work your way up. You shouldn’t have to put up with lag after a few hours of use, so one of these steps should get MacVim running smoothly again.

内容的提问来源于stack exchange，提问作者gi4c0