GNU bug report logs - #79738
[macOS] worsening performance with time

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Przemysław Alexander Kamiński
 <alexander <at> kaminski.se>
To: bug-gnu-emacs <at> gnu.org
Subject: [macOS] worsening performance with time
Date: Fri, 31 Oct 2025 11:36:24 +0100

This is followup/bug-report to discussion in: 
https://lists.gnu.org/archive/html/emacs-devel/2025-10/threads.html#00727 

macOS NS build performance gets worse over time. The issue seems 
to be a systemic one - multiple factors could be at play. 

Investigated causes so far: - Memory leaks (fixed: a few found, 
patched) - Unbounded rendering (ongoing) - VSIZE bloat - /TLB 
thrashing?/  (ongoing) - NS specific architecture impact (ongoing) 
- Memory configuration specificity (ongoing) - Side effects of 
NS-specific code, e.g., autoreleasepools (ongoing) - Extra 
calculations (ongoing, few found)  I have a few patches, which 
I'll submit as separately to tracker for discussion. However, in 
order to resolve them, I believe the following course of action is 
needed:  - Repro case
- Integration tests / benchmarks (external, maybe one that 
 includes 
 actual rendering and maybe even keypress processing) 

--  Przemysław Alexander Kamiński (vel xlii vel exlee) 
https://xlii.space  ||  https://codeberg.org/exlee 

Message #8 received at 79738 <at> debbugs.gnu.org (full text, mbox):

From: Rudolf Adamkovič <rudolf <at> adamkovic.org>
To: Przemysław Alexander Kamiński
 <alexander <at> kaminski.se>, 79738 <at> debbugs.gnu.org
Subject: Re: bug#79738: [macOS] worsening performance with time
Date: Tue, 04 Nov 2025 08:12:58 +0100

Przemysław Alexander Kamiński <alexander <at> kaminski.se> writes:

> Investigated causes so far: - Memory leaks (fixed: a few found, 
> patched) - Unbounded rendering (ongoing) - VSIZE bloat - /TLB 
> thrashing?/  (ongoing) - NS specific architecture impact (ongoing) 
> - Memory configuration specificity (ongoing) - Side effects of 
> NS-specific code, e.g., autoreleasepools (ongoing) - Extra 
> calculations (ongoing, few found)  I have a few patches, which 
> I'll submit as separately to tracker for discussion.

Thank you for improving the NS port, Przemysław!

Rudy
-- 
"I love deadlines.  I love the whooshing noise they make as they go by."

--- Douglas Adams, The Salmon of Doubt, 2002

Rudolf Adamkovič <rudolf <at> adamkovic.org> [he/him]
http://adamkovic.org

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