From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 31 Aug 2026 21:19:00 GMT
Subject: Re: [PATCH v3 0/6] last-modified: use the pathspec's Bloom key to pre-filter commits
Message-ID: <xmqqmru2ugxn.fsf@gitster.g>
In-Reply-To: <20260831-toon-speed-up-last-modified-v3-0-2bbb864acf93@iotcl.com>

Toon Claes <toon@iotcl.com> writes:

> Similar timings are seen across a few other repositories (like GitLab's
> monolith gitlab-org/gitlab).
>
> [1]: https://lore.kernel.org/git/17f356ff-7bfb-47f5-b714-62a95cc8b821@codeberg.org/
> [2]: https://codeberg.org/ziglang/zig
>
> ---
> Changes in v3:
> - Add trace2 "bloom_queries" and use it in test to verify top-level
>   wildcard behavior.
> - Link to v2: https://patch.msgid.link/20260807-toon-speed-up-last-modified-v2-0-7d87bbdeaf9b@iotcl.com

Merged to 'seen', pushed the result out, and saw this:

  https://github.com/git/git/actions/runs/33429987759/job/99612809093#step:10:1391

It seems that it is reproducible locally with the variable settings
stolen from ci/run-build-and-tests.sh, i.e.,

    $ bash
    sh-5.3$ export OPENSSL_SHA1_UNSAFE=YesPlease
    sh-5.3$ export GIT_TEST_SPLIT_INDEX=yes
    sh-5.3$ export GIT_TEST_FULL_IN_PACK_ARRAY=true
    sh-5.3$ export GIT_TEST_OE_SIZE=10
    sh-5.3$ export GIT_TEST_OE_DELTA_SIZE=5
    sh-5.3$ export GIT_TEST_COMMIT_GRAPH=1
    sh-5.3$ export GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=1
    sh-5.3$ export GIT_TEST_MULTI_PACK_INDEX=1
    sh-5.3$ export GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=1
    sh-5.3$ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
    sh-5.3$ export GIT_TEST_NO_WRITE_REV_INDEX=1
    sh-5.3$ export GIT_TEST_CHECKOUT_WORKERS=2
    sh-5.3$ export GIT_TEST_PACK_USE_BITMAP_BOUNDARY_TRAVERSAL=1
    sh-5.3$ make T='t8020*' test

and it does reproduce when the topic is tested standalone (I've kept
the base that I have used to queue the previous iteration,
41365c2a9b The 4th batch for Git 2.56).

Ejected out of 'seen' for now.