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| author | Kyle Zhao <kylezhao@tencent.com> | 2022-06-17 22:06:19 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2022-06-18 00:31:01 +0300 |
| commit | 82f67ee13fb25ebed1cd722c83de49a1ac588429 (patch) | |
| tree | b16e0af4be37a31f5f0af14c2c36aba1f6b69211 /t/t5516-fetch-push.sh | |
| parent | 8168d5e9c23ed44ae3d604f392320d66556453c9 (diff) | |
send-pack.c: add config push.useBitmaps
Reachability bitmaps are designed to speed up the "counting objects"
phase of generating a pack during a clone or fetch. They are not
optimized for Git clients sending a small topic branch via "git push".
In some cases (see [1]), using reachability bitmaps during "git push"
can cause significant performance regressions.
Add a new "push.useBitmaps" configuration variable to allow users to
tell "git push" not to use bitmaps. We already have "pack.bitmaps"
that controls the use of bitmaps, but a separate configuration variable
allows the reachability bitmaps to still be used in other areas,
such as "git upload-pack", while disabling it only for "git push".
[1]: https://lore.kernel.org/git/87zhoz8b9o.fsf@evledraar.gmail.com/
Signed-off-by: Kyle Zhao <kylezhao@tencent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/t5516-fetch-push.sh')
| -rwxr-xr-x | t/t5516-fetch-push.sh | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh index dedca106a7..b3734dd2fe 100755 --- a/t/t5516-fetch-push.sh +++ b/t/t5516-fetch-push.sh @@ -1865,4 +1865,26 @@ test_expect_success 'push warns or fails when using username:password' ' test_line_count = 1 warnings ' +test_expect_success 'push with config push.useBitmaps' ' + mk_test testrepo heads/main && + git checkout main && + test_unconfig push.useBitmaps && + GIT_TRACE2_EVENT="$PWD/default" \ + git push testrepo main:test && + test_subcommand git pack-objects --all-progress-implied --revs --stdout \ + --thin --delta-base-offset -q <default && + + test_config push.useBitmaps true && + GIT_TRACE2_EVENT="$PWD/true" \ + git push testrepo main:test2 && + test_subcommand git pack-objects --all-progress-implied --revs --stdout \ + --thin --delta-base-offset -q <true && + + test_config push.useBitmaps false && + GIT_TRACE2_EVENT="$PWD/false" \ + git push testrepo main:test3 && + test_subcommand git pack-objects --all-progress-implied --revs --stdout \ + --thin --delta-base-offset -q --no-use-bitmap-index <false +' + test_done |