[PATCH 0/3] git-receive-pack(1): optimize `assign_shallow_commits_to_refs()`

Hi,

this patch series optimizes how git-receive-pack(1) handles shallow pushes in `assign_shallow_commits_to_refs()`. This covers some edge cases that we have hit in a production repository, where shallow pushes could take many minutes and allocate a ton of memory.

Thanks!

Patrick

---
Patrick Steinhardt (3):
      commit: avoid parsing non-commits in `lookup_commit_reference_gently()`
      commit: make `repo_parse_commit_no_graph()` more robust
      commit: use commit graph in `lookup_commit_reference_gently()`

 commit.c                        | 32 +++++++++++++++++++++++++++-----
 commit.h                        | 14 ++++++++++++--
 contrib/coccinelle/commit.cocci |  2 +-
 object.c                        | 23 ++++++++++++++++++-----
 object.h                        |  5 +++++
 5 files changed, 63 insertions(+), 13 deletions(-)

--- base-commit: 852829b3dd2fe4e7c7fc4d8badde644cf1b66c74 change-id: 20260216-b4-pks-receive-pack-optimize-shallow-0a6cc508549d