[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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: Mon, 27 Nov 2017 03:53:28 +0100

I was trying to debug some code that dealt with very large SVG images,
and getting a backtrace buffer proved impossible -- Emacs would just

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.

It would be nice if the backtrace buffer would just chop off
ridiculously long strings instead of printing them.  Perhaps controlled
by a -print-length variable?

In GNU Emacs 27.0.50 (build 4, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2017-10-26 built on stories
Repository revision: 1ad56d0a6bdd07c722a3c161096a16f70d1cbb35
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description:     Debian GNU/Linux 9.2 (stretch)

(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

reply via email to

[Prev in Thread] Current Thread [Next in Thread]