At work, we recently upgraded our git version from 1.8.3.4 to 1.8.5.3. We've noticed a significant performance regression in git fetch. The numbers below are for an up-to-date branch (that is, no data is actually being fetched) for a git-over-ssh remote on our gitorious server. This is an auxiliary repository, so its size is probably between 6-7 GiB. It does not have an especially large number of refs, but is a clone of our main repository. Other than the new version, the only difference is that 1.8.5.3 is built against libpcre. These are both running on the same CentOS 6 system; literally the only difference is installing one RPM or the other. 1.8.3.4: brianc ok # for i in `seq 1 3`; do time git fetch; done git fetch 0.86s user 0.18s system 78% cpu 1.314 total git fetch 0.88s user 0.19s system 79% cpu 1.348 total git fetch 0.84s user 0.18s system 78% cpu 1.299 total 1.8.5.3: brianc ok # for i in `seq 1 3`; do time git fetch; done git fetch 17.11s user 1.22s system 98% cpu 18.652 total git fetch 16.74s user 1.24s system 98% cpu 18.286 total git fetch 17.78s user 1.35s system 98% cpu 19.446 total Does anyone have any idea what might be causing this? -- brian m. carlson / brian with sandals: Houston, Texas, US +1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
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