> The culprit, according to some callgrind investigation, is > lookup_commit_reference_gently() [for the unannotated case] or > deref_tag() [annotated case] calling parse_object(). Using the scenario you described earlier, I think it ends-up spending most of its time in check_sha1_signature (both deref_tag and lookup_commit_reference_gently() go there) with 20% inflating, 80% in SHA1_Update(). Not much we can do about that, can we ? -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html