From: Helmut Eller <eller.helmut@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Pip Cet <pipcet@protonmail.com>,
Ihor Radchenko <yantar92@posteo.net>,
emacs-devel@gnu.org
Subject: Re: Markers in a gap array
Date: Wed, 17 Jul 2024 18:48:07 +0200 [thread overview]
Message-ID: <87v81455iw.fsf@gmail.com> (raw)
In-Reply-To: <jwvo77c28lx.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Thu, 04 Jul 2024 16:42:41 -0400")
On Thu, Jul 04 2024, Stefan Monnier wrote:
>> Could you share a more complete recipe for the benchmark? I wonder how it
>> compares to Gerd's weak vector/freelist in scratch/igc.
>
> Put it into the `benchmark` subdir of `elisp-benchmarks` and then do
>
> emacs --batch -Q -l .../elisp-benchmarks/elisp-benchmarks-autoloads.el \
> --eval '(elisp-benchmarks-run "bytechar")'
>
The current scratch/igc branch, configured with MPS and -O2
-fno-omit-frame-pointer:
| test || tot avg (s) | tot avg err (s) |
|------------------------++-------------+-----------------|
| bytechar || 12.11 | 0.18 |
| bytechar-100k || 12.38 | 0.17 |
| bytechar-100k-nolookup || 9.14 | 0.22 |
| bytechar-100k-random || 271.52 | 14.27 |
| bytechar-100k-rev || 12.38 | 0.24 |
| bytechar-10k-random || 38.08 | 1.43 |
| bytechar-1k-random || 14.95 | 0.48 |
| bytechar-nolookup || 8.97 | 0.12 |
|------------------------++-------------+-----------------|
| total || 379.53 | 14.36 |
and without MPS:
| test || tot avg (s) | tot avg err (s) |
|------------------------++-------------+-----------------|
| bytechar || 11.42 | 0.03 |
| bytechar-100k || 11.48 | 0.02 |
| bytechar-100k-nolookup || 9.15 | 0.00 |
| bytechar-100k-random || 16.39 | 0.02 |
| bytechar-100k-rev || 11.48 | 0.02 |
| bytechar-10k-random || 11.97 | 0.02 |
| bytechar-1k-random || 11.56 | 0.01 |
| bytechar-nolookup || 9.13 | 0.04 |
|------------------------++-------------+-----------------|
| total || 92.58 | 0.06 |
So the weak vector doesn't compare very well to the linked list. Maybe
because the vector only grows and never shrinks. The idea with the
sorted markers in a gap array would probably avoid the worst of this. I
wonder why the linked list doesn't seem similar issues.
next prev parent reply other threads:[~2024-07-17 16:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-04 4:59 Markers in a gap array Stefan Monnier
2024-07-04 10:24 ` Ihor Radchenko
2024-07-04 13:16 ` Stefan Monnier
2024-07-04 14:30 ` Ihor Radchenko
2024-07-04 20:11 ` Stefan Monnier
2024-07-04 20:34 ` Pip Cet
2024-07-04 20:42 ` Stefan Monnier
2024-07-17 16:48 ` Helmut Eller [this message]
2024-07-18 20:46 ` Stefan Monnier
2024-07-26 19:48 ` Helmut Eller
2024-08-05 19:54 ` MPS: marker-vector (was: Markers in a gap array) Helmut Eller
2024-08-05 21:14 ` MPS: marker-vector Pip Cet
2024-08-06 6:28 ` Helmut Eller
2024-08-06 6:51 ` Gerd Möllmann
2024-08-06 14:36 ` Pip Cet
2024-08-06 16:15 ` Helmut Eller
2024-08-06 3:59 ` Gerd Möllmann
2024-08-06 6:02 ` Helmut Eller
2024-07-04 22:24 ` Markers in a gap array Stefan Monnier
2024-07-07 12:31 ` Ihor Radchenko
2024-07-07 13:09 ` Konstantin Kharlamov
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