GNU bug report logs - #39361
continuation and gc performance

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Message #14 received at 39361 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
Cc: 39361 <at> debbugs.gnu.org
Subject: Re: bug#39361: continuation and gc performance
Date: Sun, 22 Mar 2020 21:51:31 +0100

Hi,

Stefan Israelsson Tampe <stefan.itampe <at> gmail.com> skribis:

> That function marks the working stack no, what about stack segments in
> continuations will they be marked correctly as well?

Oh you’re right, from a quick look at continuations.c, a continuation’s
stack appears to be conservatively scanned (allocated with
‘scm_gc_malloc’).

My intuition is that it’s “good enough” in most cases, but could affect
GC performance a tiny bit in continuation-heavy code, such as Fibers.

Ludo’.

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