Comment by caspar

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.