| commit | 84243da1298890bd7370df66b754c2b252a08346 | [log] [tgz] |
|---|---|---|
| author | Jeff King <peff@peff.net> | Fri Feb 14 13:22:39 2020 -0500 |
| committer | Junio C Hamano <gitster@pobox.com> | Fri Feb 14 10:46:22 2020 -0800 |
| tree | 9c6bc7d501984fc8a5068935683f50180e08cc46 | |
| parent | 4f3bd5606a02260274555f41fd7d6368f2bea1d8 [diff] |
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>
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