> From: Chris Moore <christopher.ian.mo...@gmail.com> > Date: Mon, 2 Sep 2024 12:35:18 -0300 > > I've been seeing Emacs hang up repeatedly for no apparent reason recently > while editing shell scripts. I spent > the time to isolate the issue. It turns out that I can reproduce the issue by > opening a new shell script file and > typing the word "in" 20 or 30 times on a single line: > > $ emacs -Q > C-x C-f /tmp/x.sh > echo in in in in in in in in in in in in in in in in in in in in in in in in > in in in in in in > > After about 20 'in's, things slow down noticeably, and I can't get to 30 > without it hanging.
The profile is below. Maybe Stefan (CC'ed) has some comments or suggestions. 36361 58% - timer-event-handler 36361 58% - apply 36361 58% - show-paren-function 36361 58% - #<advice 1DA> 36361 58% - apply 36361 58% - smie--matching-block-data 36359 58% - smie--opener/closer-at-point 36068 57% - sh-smie-sh-forward-token 23841 38% - sh-smie--sh-keyword-p 23841 38% - sh-smie--sh-keyword-in/do-p 23841 38% - sh-smie-sh-backward-token 23837 38% - sh-smie--sh-keyword-p 23837 38% - sh-smie--sh-keyword-in/do-p 23837 38% - sh-smie-sh-backward-token 23805 38% - sh-smie--sh-keyword-p 23801 38% - sh-smie--sh-keyword-in/do-p 23793 38% - sh-smie-sh-backward-token 23685 38% - sh-smie--sh-keyword-p 23681 38% - sh-smie--sh-keyword-in/do-p 23665 37% - sh-smie-sh-backward-token 23425 37% - sh-smie--sh-keyword-p 23409 37% - sh-smie--sh-keyword-in/do-p 23349 37% - sh-smie-sh-backward-token 13623 21% looking-back 6152 9% sh-smie--default-backward-token 3368 5% - sh-smie--sh-keyword-p 1655 2% sh-smie--sh-keyword-in/do-p 28 0% assoc 136 0% looking-back 44 0% sh-smie--default-backward-token 8 0% assoc 64 0% looking-back 20 0% sh-smie--default-backward-token 4 0% assoc 16 0% sh-smie--default-backward-token 8 0% looking-back 4 0% sh-smie--default-backward-token 12227 19% - sh-smie--newline-semi-p 12227 19% - sh-smie-sh-backward-token 12227 19% - sh-smie--sh-keyword-p 12227 19% - sh-smie--sh-keyword-in/do-p 12227 19% - sh-smie-sh-backward-token 12227 19% - sh-smie--sh-keyword-p 12227 19% - sh-smie--sh-keyword-in/do-p 12227 19% - sh-smie-sh-backward-token 12223 19% - sh-smie--sh-keyword-p 12223 19% - sh-smie--sh-keyword-in/do-p 12223 19% - sh-smie-sh-backward-token 12203 19% - sh-smie--sh-keyword-p 12203 19% - sh-smie--sh-keyword-in/do-p 12199 19% - sh-smie-sh-backward-token 12143 19% - sh-smie--sh-keyword-p 12143 19% - sh-smie--sh-keyword-in/do-p 10012 16% sh-smie-sh-backward-token 2119 3% assoc 36 0% looking-back [...] 25633 41% Automatic GC