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bug#29463: 27.0.50; Backtraces with large strings is very slow
From: |
Lars Ingebrigtsen |
Subject: |
bug#29463: 27.0.50; Backtraces with large strings is very slow |
Date: |
Sat, 21 Sep 2019 10:20:41 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Lars Ingebrigtsen <larsi@gnus.org> writes:
> I was trying to debug some code that dealt with very large SVG images,
> and getting a backtrace buffer proved impossible -- Emacs would just
> hang.
>
> Here's a trivial test case:
>
> (let ((a (make-string 100000000 ?a)))
> (debug a))
>
> On my machine, this takes about half a minute to display, but if you
> have deeply nested code that the debugger is trying to display, you'll
> get that additional time per frame, I think, so it can take arbitrarily
> long to render the buffer.
This has been fixed in Emacs 27 by shortening the display of the
strings, so I'm closing this bug report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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Lars Ingebrigtsen <=