From: Eric Wong <e@80x24.org>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Cc: git@vger.kernel.org
Subject: scripting speedups [was: [Summit topic] Crazy (and not so crazy) ideas]
Date: Tue, 26 Oct 2021 20:14:49 +0000 [thread overview]
Message-ID: <20211026201448.GA29480@dcvr> (raw)
In-Reply-To: <nycvar.QRO.7.76.6.2110211144490.56@tvgsbejvaqbjf.bet>
Johannes Schindelin <Johannes.Schindelin@gmx.de> wrote:
> * Test suite is slow. Shell scripts and process forking.
>
> * What if we had a special shell that interpreted the commands in a
> single process?
>
> * Even Git commands like rev-parse and hash-object, as long as that’s
> not the command you’re trying to test
This is something I've wanted in a very long time as a scripter.
fast-import has been great over the years, as is
"cat-file --batch(-check)", but there's gaps should be filled
(preferably without fragile linkage of shared libraries into a
script process)
> * Dscho wants to slip in a C-based solution
>
> * Jonathan tan commented: going back to your custom shell for tests
> idea, one thing we could do is have a custom command that generates
> the repo commits that we want (and that saves process spawns and
> might make the tests simpler too)
Perhaps a not-seriously-proposed patch from 2006 could be
modernized for our now-libified internals:
https://yhbt.net/lore/git/Pine.LNX.4.64.0602232229340.3771@g5.osdl.org/
> * We could replace several “setup repo” steps with “git fast-import”
> instead.
>
> * Dscho measured: 0.5 sec - 30 sec in setup steps. Can use fast-import,
> or can make a new format that helps us set up the test scenario
0.5s - 30s across the whole suite or individual tests?
Having a way to disable fsync globally should further improve
things, especially for people on slower storage. libeatmydata
is available, but perhaps not widely available/known.
> * Elijah: test-lib-functions helpers could be built ins
next prev parent reply other threads:[~2021-10-26 20:14 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 11:55 Notes from the Git Contributors' Summit 2021, virtual, Oct 19/20 Johannes Schindelin
2021-10-21 11:55 ` [Summit topic] Crazy (and not so crazy) ideas Johannes Schindelin
2021-10-21 12:30 ` Son Luong Ngoc
2021-10-26 20:14 ` Eric Wong [this message]
2021-10-30 19:58 ` scripting speedups [was: [Summit topic] Crazy (and not so crazy) ideas] Ævar Arnfjörð Bjarmason
2021-11-03 9:24 ` test suite speedups via some not-so-crazy ideas (was: scripting speedups[...]) Ævar Arnfjörð Bjarmason
2021-11-03 22:12 ` test suite speedups via some not-so-crazy ideas Junio C Hamano
2021-11-02 13:52 ` scripting speedups [was: [Summit topic] Crazy (and not so crazy) ideas] Johannes Schindelin
2021-10-21 11:55 ` [Summit topic] SHA-256 Updates Johannes Schindelin
2021-10-21 11:56 ` [Summit topic] Server-side merge/rebase: needs and wants? Johannes Schindelin
2021-10-22 3:06 ` Bagas Sanjaya
2021-10-22 10:01 ` Johannes Schindelin
2021-10-23 20:52 ` Ævar Arnfjörð Bjarmason
2021-11-08 18:21 ` Taylor Blau
2021-11-09 2:15 ` Ævar Arnfjörð Bjarmason
2021-11-30 10:06 ` Christian Couder
2021-10-21 11:56 ` [Summit topic] Submodules and how to make them worth using Johannes Schindelin
2021-10-21 11:56 ` [Summit topic] Sparse checkout behavior and plans Johannes Schindelin
2021-10-21 11:56 ` [Summit topic] The state of getting a reftable backend working in git.git Johannes Schindelin
2021-10-25 19:00 ` Han-Wen Nienhuys
2021-10-25 22:09 ` Ævar Arnfjörð Bjarmason
2021-10-26 8:12 ` Han-Wen Nienhuys
2021-10-28 14:17 ` Philip Oakley
2021-10-26 15:51 ` Philip Oakley
2021-10-21 11:56 ` [Summit topic] Documentation (translations, FAQ updates, new user-focused, general improvements, etc.) Johannes Schindelin
2021-10-22 14:20 ` Jean-Noël Avila
2021-10-22 14:31 ` Ævar Arnfjörð Bjarmason
2021-10-27 7:02 ` Jean-Noël Avila
2021-10-27 8:50 ` Jeff King
2021-10-21 11:56 ` [Summit topic] Increasing diversity & inclusion (transition to `main`, etc) Johannes Schindelin
2021-10-21 12:55 ` Son Luong Ngoc
2021-10-22 10:02 ` vale check, was " Johannes Schindelin
2021-10-22 10:03 ` Johannes Schindelin
2021-10-21 11:57 ` [Summit topic] Improving Git UX Johannes Schindelin
2021-10-21 16:45 ` changing the experimental 'git switch' (was: [Summit topic] Improving Git UX) Ævar Arnfjörð Bjarmason
2021-10-21 23:03 ` changing the experimental 'git switch' Junio C Hamano
2021-10-22 3:33 ` changing the experimental 'git switch' (was: [Summit topic] Improving Git UX) Bagas Sanjaya
2021-10-22 14:04 ` martin
2021-10-22 14:24 ` Ævar Arnfjörð Bjarmason
2021-10-22 15:30 ` martin
2021-10-23 8:27 ` changing the experimental 'git switch' Sergey Organov
2021-10-22 21:54 ` Sergey Organov
2021-10-24 6:54 ` changing the experimental 'git switch' (was: [Summit topic] Improving Git UX) Martin
2021-10-24 20:27 ` changing the experimental 'git switch' Junio C Hamano
2021-10-25 12:48 ` Ævar Arnfjörð Bjarmason
2021-10-25 17:06 ` Junio C Hamano
2021-10-25 16:44 ` Sergey Organov
2021-10-25 22:23 ` Ævar Arnfjörð Bjarmason
2021-10-27 18:54 ` Sergey Organov
2021-10-21 11:57 ` [Summit topic] Improving reviewer quality of life (patchwork, subsystem lists?, etc) Johannes Schindelin
2021-10-21 13:41 ` Konstantin Ryabitsev
2021-10-22 22:06 ` Ævar Arnfjörð Bjarmason
2021-10-22 8:02 ` Missing notes, was Re: Notes from the Git Contributors' Summit 2021, virtual, Oct 19/20 Johannes Schindelin
2021-10-22 8:22 ` Johannes Schindelin
2021-10-22 8:30 ` Johannes Schindelin
2021-10-22 9:07 ` Johannes Schindelin
2021-10-22 9:44 ` Let's have public Git chalk talks, " Johannes Schindelin
2021-10-25 12:58 ` Ævar Arnfjörð Bjarmason
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211026201448.GA29480@dcvr \
--to=e@80x24.org \
--cc=Johannes.Schindelin@gmx.de \
--cc=git@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).