From: Stephen Molitor via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: "Eli Zaretskii" <eliz@gnu.org>,
"Gerd Möllmann" <gerd.moellmann@gmail.com>,
69773@debbugs.gnu.org
Subject: bug#69773: 29.2; Emacs Crashes on Startup Sometimes
Date: Fri, 15 Mar 2024 09:32:32 -0500 [thread overview]
Message-ID: <9E771A39-F942-4B3A-8491-D4A0DCBA82F4@icloud.com> (raw)
In-Reply-To: <86zfv07x8z.fsf@gnu.org>
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Thanks for the benchmarking function. Here are the results I get running it three times on a fresh start of Emacs on src/xdisp.c:
with smart kerning:
GCs: 2 Elapsed time: 14.546864 seconds
GCs: 1 Elapsed time: 9.899920 seconds
GCs: 1 Elapsed time: 9.880759 seconds
without smart kerning
GCs: 2 Elapsed time: 12.188979 seconds
GCs: 0 Elapsed time: 7.264108 seconds
GCs: 1 Elapsed time: 7.346031 seconds
So it’s about a third slower. The difference is noticable.
> Btw, why aren't digit characters 0-9 in the regexp you use in sm-safe-table? More generally, why not all of the ASCII characters are there? isn't smart kerning performed for them as well? Come to think about that, what about Latin non-ASCII characters like á etc.?
The font I’m using, Commit Mono, only does smart kerning on a limited set of characters:
https://github.com/eigilnikolajsen/commit-mono/blob/main/src/features/kern_smartkerning.fea
commit-mono/src/features/kern_smartkerning.fea at main · eigilnikolajsen/commit-mono
github.com
> On Mar 15, 2024, at 2:46 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> From: Stephen Molitor <stephen.molitor@icloud.com>
>> Date: Thu, 14 Mar 2024 17:10:37 -0500
>>
>> Not that I’ve noticed.
>>
>> I mean maybe it does, but I haven’t noticed. I have a fast machine. Is there an easy way to measure?
>
> Yes, of course. Here's one example:
>
> (defun scroll-up-benchmark ()
> (interactive)
> (let ((oldgc gcs-done)
> (oldtime (float-time)))
> (condition-case nil (while t (scroll-up) (redisplay))
> (error (message "GCs: %d Elapsed time: %f seconds"
> (- gcs-done oldgc) (- (float-time) oldtime))))))
>
> Run this on a large file (I use src/xdisp.c) with and without your
> set-char-table-range customization, and compare the results.
>
> Btw, why aren't digit characters 0-9 in the regexp you use in
> sm-safe-table? More generally, why not all of the ASCII characters
> are there? isn't smart kerning performed for them as well? Come to
> think about that, what about Latin non-ASCII characters like á etc.?
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next prev parent reply other threads:[~2024-03-15 14:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-13 13:32 bug#69773: 29.2; Emacs Crashes on Startup Sometimes Stephen Molitor via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-13 15:03 ` Gerd Möllmann
2024-03-14 16:15 ` Stephen Molitor via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-14 16:52 ` Eli Zaretskii
2024-03-14 22:10 ` Stephen Molitor via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-15 7:46 ` Eli Zaretskii
2024-03-15 14:32 ` Stephen Molitor via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2024-03-14 17:42 ` Gerd Möllmann
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