> From: Chris Moore <[email protected]>
> 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
