Likely a separate issue, but I also have massive slowdowns whenever the agent manages to read a particularly long line from a grep or similar (as in, multiple seconds before characters I type actually appear, and sometimes it's difficult to get claude code to register any keypresses at all).
Suspect it's because their "60 frames a second" layout logic is trying to render extremely long lines, maybe with some kind of wrapping being unnecessarily applied. Could obviously just trim the rendered output after the first, I dunno, 1000 characters in a line, but apparently nobody has had time to ask claude code to patch itself to do that.
What OS? Does this happen randomly, after long sessions, after context compression? Do you have any plugins / mcp servers running?
I used to have this same issue almost every session that lasted longer than 30 minutes. It seemed to be related to Claude having issues with large context windows.
It stopped happening maybe a month ago but then I had it happen again last week.
I realized it was due to a third-party mcp server. I uninstalled it and haven’t had that issue since. Might be worth looking into.
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