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| author | Taylor Blau <me@ttaylorr.com> | 2023-07-10 17:12:42 -0400 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2023-07-10 14:48:56 -0700 |
| commit | cc2a1f98ac1042c7cca0ecedd6d57819c6b8e02e (patch) | |
| tree | 468dfe3cf456b96144aa3e131744d206a20b7a8e | |
| parent | refs.h: implement `hidden_refs_to_excludes()` (diff) | |
| download | git-cc2a1f98ac1042c7cca0ecedd6d57819c6b8e02e.tar.gz git-cc2a1f98ac1042c7cca0ecedd6d57819c6b8e02e.zip | |
builtin/receive-pack.c: avoid enumerating hidden references
Now that `refs_for_each_fullref_in()` has the ability to avoid
enumerating references matching certain pattern(s), use that to avoid
visiting hidden refs when constructing the ref advertisement via
receive-pack.
Note that since this exclusion is best-effort, we still need
`show_ref_cb()` to check whether or not each reference is hidden or not
before including it in the advertisement.
As was the case when applying this same optimization to `upload-pack`,
`receive-pack`'s reference advertisement phase can proceed much quicker
by avoiding enumerating references that will not be part of the
advertisement.
(Below, we're still using linux.git with one hidden refs/pull/N ref per
commit):
$ hyperfine -L v ,.compile 'git{v} -c transfer.hideRefs=refs/pull receive-pack --advertise-refs .git'
Benchmark 1: git -c transfer.hideRefs=refs/pull receive-pack --advertise-refs .git
Time (mean ± σ): 89.1 ms ± 1.7 ms [User: 82.0 ms, System: 7.0 ms]
Range (min … max): 87.7 ms … 95.5 ms 31 runs
Benchmark 2: git.compile -c transfer.hideRefs=refs/pull receive-pack --advertise-refs .git
Time (mean ± σ): 4.5 ms ± 0.2 ms [User: 0.5 ms, System: 3.9 ms]
Range (min … max): 4.1 ms … 5.6 ms 508 runs
Summary
'git.compile -c transfer.hideRefs=refs/pull receive-pack --advertise-refs .git' ran
20.00 ± 1.05 times faster than 'git -c transfer.hideRefs=refs/pull receive-pack --advertise-refs .git'
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | builtin/receive-pack.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index 1a8472eddc..dede0df3cf 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -337,7 +337,9 @@ static void write_head_info(void) { static struct oidset seen = OIDSET_INIT; - for_each_ref(show_ref_cb, &seen); + refs_for_each_fullref_in(get_main_ref_store(the_repository), "", + hidden_refs_to_excludes(&hidden_refs), + show_ref_cb, &seen); for_each_alternate_ref(show_one_alternate_ref, &seen); oidset_clear(&seen); if (!sent_capabilities) |