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rev-list: add an option to mark fewer edges as uninteresting

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In commit fbd4a70 (list-objects: mark more commits as edges in
mark_edges_uninteresting - 2013-08-16), we marked an increasing number
of edges uninteresting.  This change, and the subsequent change to make
this conditional on --objects-edge, are used by --thin to make much
smaller packs for shallow clones.

Unfortunately, they cause a significant performance regression when
pushing non-shallow clones with lots of refs (23.322 seconds vs.
4.785 seconds with 22400 refs).  Add an option to git rev-list,
--objects-edge-aggressive, that preserves this more aggressive behavior,
while leaving --objects-edge to provide more performant behavior.
Preserve the current behavior for the moment by using the aggressive
option.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson
2014-12-24 23:05:39 +00:00
committed by Junio C Hamano
parent 8297643fcd
commit 1684c1b219
6 changed files with 16 additions and 4 deletions
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4
list-objects.c
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@ -157,7 +157,7 @@ void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
if (commit->object.flags & UNINTERESTING) {
mark_tree_uninteresting(commit->tree);
if (revs->edge_hint && !(commit->object.flags & SHOWN)) {
if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
commit->object.flags |= SHOWN;
show_edge(commit);
}
@ -165,7 +165,7 @@ void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
}
mark_edge_parents_uninteresting(commit, revs, show_edge);
}
if (revs->edge_hint) {
if (revs->edge_hint_aggressive) {
for (i = 0; i < revs->cmdline.nr; i++) {
struct object *obj = revs->cmdline.rev[i].item;
struct commit *commit = (struct commit *)obj;