On Mon, Aug 13, 2018 at 6:05 PM Ben Peart <peartben@xxxxxxxxx> wrote: > I was part way through writing a patch that would copy the valid parts > of the cache-tree from the source index to the dest index Yeah sorry about that. I make bad judgements all the time, unfortunately. If it's sort of working though, please post to the list anyway to archive it. Who knows, some time down the road we might actually need it again. > I run some tests on a large repo and the results look very promising. > > base new diff % saved > 0.55 0.52 0.02 4.32% s: read cache .git/index > 0.31 0.30 0.01 2.98% s: initialize name hash > 0.03 0.02 0.00 9.98% s: preload index > 0.09 0.09 0.00 4.86% s: refresh index > 5.93 1.19 4.74 79.95% s: traverse_trees > 0.12 0.13 -0.01 -4.15% s: check_updates > 2.14 0.00 2.14 100.00% s: cache_tree_update > 10.63 4.29 6.33 59.59% s: unpack_trees There's a big gap here, I think. unpack_trees() takes 4s but the sum of traverse_trees, check_updates and cache_tree_update is 1.5s top. I guess that's sparse checkout and stuff? It's either that or there's another big hidden thing we should pay attention to ;-) > 0.97 0.91 0.06 6.41% s: write index, changed mask = 28 > 3.49 0.18 3.31 94.91% s: traverse_trees > 0.00 0.00 0.00 17.53% s: check_updates > 3.61 0.30 3.31 91.77% s: unpack_trees > 3.61 0.30 3.31 91.77% s: diff-index > 17.28 8.36 8.92 51.62% s: git command: c:git.exe checkout > > Same methodology as before, I ran "git checkout" 5 times, threw away the > first 2 runs and averaged the last 3. I entered 0 for the "new" > cache_tree_update line as it no longer reports anything. -- Duy
