Here's the series I mentioned earlier in the thread to cache loose objects when answering has_object_file(..., OBJECT_INFO_QUICK). For those just joining us, this makes operations that look up a lot of missing objects (like "index-pack" looking for collisions) faster. This is mostly targeted at systems where stat() is slow, like over NFS, but it seems to give a 2% speedup indexing a full git.git packfile into an empty repository (i.e., what you'd see on a clone).
I'm adding René Scharfe and Takuto Ikuta to the cc for their previous work in loose-object caching. The interesting bit is patch 8. The rest of it is cleanup to let us treat alternates and the main object directory similarly. [1/9]: fsck: do not reuse child_process structs [2/9]: submodule--helper: prefer strip_suffix() to ends_with() [3/9]: rename "alternate_object_database" to "object_directory" [4/9]: sha1_file_name(): overwrite buffer instead of appending [5/9]: handle alternates paths the same as the main object dir [6/9]: sha1-file: use an object_directory for the main object dir [7/9]: object-store: provide helpers for loose_objects_cache [8/9]: sha1-file: use loose object cache for quick existence check [9/9]: fetch-pack: drop custom loose object cache builtin/count-objects.c | 4 +- builtin/fsck.c | 35 +++--- builtin/grep.c | 2 +- builtin/submodule--helper.c | 9 +- commit-graph.c | 13 +-- environment.c | 4 +- fetch-pack.c | 39 +------ http-walker.c | 2 +- http.c | 4 +- object-store.h | 60 +++++------ object.c | 26 ++--- packfile.c | 20 ++-- path.c | 2 +- repository.c | 8 +- sha1-file.c | 210 ++++++++++++++++++------------------ sha1-name.c | 42 ++------ transport.c | 2 +- 17 files changed, 209 insertions(+), 273 deletions(-) -Peff
