Derrick Stolee <stolee@xxxxxxxxx> writes: > On 10/3/2017 6:49 AM, Junio C Hamano wrote: >> Derrick Stolee <dstolee@xxxxxxxxxxxxx> writes: >> >>> p0008.1: find_unique_abbrev() for existing objects >>> -------------------------------------------------- >>> >>> For 10 repeated tests, each checking 100,000 known objects, we find the >>> following results when running in a Linux VM: >>> >>> | | Pack | Packed | Loose | Base | New | | >>> | Repo | Files | Objects | Objects| Time | Time | Rel% | >>> |-------|-------|---------|--------|--------|--------|---------| >>> | Git | 1 | 230078 | 0 | 0.09 s | 0.06 s | - 33.3% | >>> | Git | 5 | 230162 | 0 | 0.11 s | 0.08 s | - 27.3% | >>> | Git | 4 | 154310 | 75852 | 0.09 s | 0.07 s | - 22.2% | >>> | Linux | 1 | 5606645 | 0 | 0.12 s | 0.32 s | +146.2% | >>> | Linux | 24 | 5606645 | 0 | 1.12 s | 1.12 s | - 0.9% | >>> | Linux | 23 | 5283204 | 323441 | 1.08 s | 1.05 s | - 2.8% | >>> | VSTS | 1 | 4355923 | 0 | 0.12 s | 0.23 s | + 91.7% | >>> | VSTS | 32 | 4355923 | 0 | 1.02 s | 1.08 s | + 5.9% | >>> | VSTS | 31 | 4276829 | 79094 | 2.25 s | 2.08 s | - 7.6% | >> >> The above does not look so good, especially in cases where a >> repository is well maintained by packing into smaller number of >> packs, we get much worse result? > > I understand that this patch on its own does not have good numbers. I > split the > patches 3 and 4 specifically to highlight two distinct changes: > > Patch 3: Unroll the len loop that may inspect all files multiple times. > Patch 4: Parse less while disambiguating. > > Patch 4 more than makes up for the performance hits in this patch. Now you confused me even more. When we read the similar table that appears in [Patch 4/5], what does the "Base Time" column mean? Vanilla Git with [Patch 3/5] applied? Vanillay Git with [Patch 4/5] alone applied? Something else?
