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revision.c: reduce object database queries
In mark_parents_uninteresting(), we check for the existence of an object file to see if we should treat a commit as parsed. The result is to set the "parsed" bit on the commit. Modify the condition to only check has_object_file() if the result would change the parsed bit. When a local branch is different from its upstream ref, "git status" will compute ahead/behind counts. This uses paint_down_to_common() and hits mark_parents_uninteresting(). On a copy of the Linux repo with a local instance of "master" behind the remote branch "origin/master" by ~60,000 commits, we find the performance of "git status" went from 1.42 seconds to 1.32 seconds, for a relative difference of -7.0%. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Reviewed-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -110,7 +110,8 @@ void mark_parents_uninteresting(struct commit *commit)
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* it is popped next time around, we won't be trying
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* to parse it and get an error.
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*/
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if (!has_object_file(&commit->object.oid))
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if (!commit->object.parsed &&
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!has_object_file(&commit->object.oid))
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commit->object.parsed = 1;
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if (commit->object.flags & UNINTERESTING)
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