On Wed, Apr 20, 2016 at 7:28 PM, Johannes Schindelin <johannes.schinde...@gmx.de> wrote: > Hi Duy, > > On Wed, 20 Apr 2016, Nguyễn Thái Ngọc Duy wrote: > >> All the known heavy code blocks are measured (except object database >> access). This should help identify if an optimization is effective or >> not. An unoptimized git-status would give something like below (92% of >> time is accounted). To sum up the effort of making git scale better: >> >> - read cache line is being addressed by index-helper >> - preload/refresh index by watchman >> - read packed refs by lmdb backend >> - diff-index by rebuilding cache-tree >> - read directory by untracked cache and watchman >> - write index by split index >> - name hash potientially by index-helper >> >> read-cache.c:2075 performance: 0.004058570 s: read cache .../index >> preload-index.c:104 performance: 0.004419864 s: preload index >> read-cache.c:1265 performance: 0.000185224 s: refresh index >> refs/files-backend.c:1100 performance: 0.001935788 s: read packed refs >> diff-lib.c:240 performance: 0.000144132 s: diff-files >> diff-lib.c:506 performance: 0.013592000 s: diff-index >> name-hash.c:128 performance: 0.000614177 s: initialize name hash >> dir.c:2030 performance: 0.015814103 s: read directory >> read-cache.c:2565 performance: 0.004052343 s: write index, changed >> mask = 2 >> trace.c:420 performance: 0.048365509 s: git command: './git' >> 'status' > > Thank you for doing this! It will be *highly* valuable to get the > performance on Windows where I want it to be, too.
Just to be clear, these are unoptimized numbers, no untracked cache, no split index, no index helper, and on a tiny repository that is git.git. It's mostly to show the percentage of time spent in each phase. We probably can do similar measurement and record it in the watchman patch (can't wait for lmdb to be here :). -- Duy -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
