GNU bug report logs - #35321
[PATCH] * src/bytecode.c (exec_byte_code) Unroll Blist3 and Blist4

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Package: emacs;

Reported by: Alex Gramiak <agrambot <at> gmail.com>

Date: Fri, 19 Apr 2019 14:42:01 UTC

Severity: wishlist

Tags: fixed, patch

Fixed in version 27.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Alex Gramiak <agrambot <at> gmail.com>
Cc: 35321 <at> debbugs.gnu.org
Subject: bug#35321: [PATCH] * src/bytecode.c (exec_byte_code) Unroll Blist3 and Blist4
Date: Fri, 19 Apr 2019 23:49:13 +0300

> From: Alex Gramiak <agrambot <at> gmail.com>
> Cc: 35321 <at> debbugs.gnu.org
> Date: Fri, 19 Apr 2019 14:30:03 -0600
> 
> > Does this produce any tangible performance gains?
> 
> It seems to be within error. I was just in the byte compiler recently
> and saw that Blist3/4 don't use list3/4 like Blist2 uses list2. If
> you're worried about touching older code for little gain, then I guess
> it's safer to leave it alone.

Is there any reason other than performance to make the change?

Also, are Blist3/4 used frequently enough to justify the change?
This bug report was last modified 6 years and 24 days ago.

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