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| author |  Jeff King <peff@peff.net> | 2020-02-14 13:22:39 -0500 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2020-02-14 10:46:22 -0800 |
| commit | 84243da1298890bd7370df66b754c2b252a08346 (patch) | |
| tree | 9c6bc7d501984fc8a5068935683f50180e08cc46 /t/perf | |
| parent | pack-bitmap: implement BLOB_NONE filtering (diff) | |
| download | tgif-84243da1298890bd7370df66b754c2b252a08346.tar.xz | |
pack-bitmap: implement BLOB_LIMIT filtering
Just as the previous commit implemented BLOB_NONE, we can support
BLOB_LIMIT filters by looking at the sizes of any blobs in the result
and unsetting their bits as appropriate. This is slightly more expensive
than BLOB_NONE, but still produces a noticeable speedup (these results
are on git.git):
Test HEAD~2 HEAD
------------------------------------------------------------------------------------
5310.9: rev-list count with blob:none 1.80(1.77+0.02) 0.22(0.20+0.02) -87.8%
5310.10: rev-list count with blob:limit=1k 1.99(1.96+0.03) 0.29(0.25+0.03) -85.4%
The implementation is similar to the BLOB_NONE one, with the exception
that we have to go object-by-object while walking the blob-type bitmap
(since we can't mask out the matches, but must look up the size
individually for each blob). The trick with using ctz64() is taken from
show_objects_for_type(), which likewise needs to find individual bits
(but wants to quickly skip over big chunks without blobs).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/perf')
| -rwxr-xr-x | t/perf/p5310-pack-bitmaps.sh | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/t/perf/p5310-pack-bitmaps.sh b/t/perf/p5310-pack-bitmaps.sh index 936742314c..8b43a545c1 100755 --- a/t/perf/p5310-pack-bitmaps.sh +++ b/t/perf/p5310-pack-bitmaps.sh @@ -52,6 +52,11 @@ test_perf 'rev-list count with blob:none' ' --filter=blob:none >/dev/null ' +test_perf 'rev-list count with blob:limit=1k' ' + git rev-list --use-bitmap-index --count --objects --all \ + --filter=blob:limit=1k >/dev/null +' + test_expect_success 'create partial bitmap state' ' # pick a commit to represent the repo tip in the past cutoff=$(git rev-list HEAD~100 -1) && |