Taylor Blau <me@xxxxxxxxxxxx> writes:
> But now that we support tree filters, there's opportunity for savings. A
> tree:depth=0 filter means we can avoid accessing trees entirely, since
> we know we won't them (or any of the subtrees or blobs they point to).
"we know we won't _have_ them"?
> @@ -506,7 +506,8 @@ static int should_include(struct commit *commit, void *_data)
> static struct bitmap *find_objects(struct bitmap_index *bitmap_git,
> struct rev_info *revs,
> struct object_list *roots,
> - struct bitmap *seen)
> + struct bitmap *seen,
> + struct list_objects_filter_options *filter)
> {
> struct bitmap *base = NULL;
> int needs_walk = 0;
> @@ -599,8 +600,9 @@ static struct bitmap *find_objects(struct bitmap_index *bitmap_git,
> show_data.bitmap_git = bitmap_git;
> show_data.base = base;
>
> - traverse_commit_list(revs, show_commit, show_object,
> - &show_data);
> + traverse_commit_list_filtered(filter, revs,
> + show_commit, show_object,
> + &show_data, NULL);
And then finally the change in step 1/4 pays off.
> }
>
> return base;
> @@ -999,7 +1001,8 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
>
> if (haves) {
> revs->ignore_missing_links = 1;
> - haves_bitmap = find_objects(bitmap_git, revs, haves, NULL);
> + haves_bitmap = find_objects(bitmap_git, revs, haves, NULL,
> + filter);
> reset_revision_walk();
> revs->ignore_missing_links = 0;
>
> @@ -1007,7 +1010,8 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
> BUG("failed to perform bitmap walk");
> }
>
> - wants_bitmap = find_objects(bitmap_git, revs, wants, haves_bitmap);
> + wants_bitmap = find_objects(bitmap_git, revs, wants, haves_bitmap,
> + filter);
>
> if (!wants_bitmap)
> BUG("failed to perform bitmap walk");
> diff --git a/t/perf/p5310-pack-bitmaps.sh b/t/perf/p5310-pack-bitmaps.sh
> index 75ccf9f4e3..b3e725f031 100755
> --- a/t/perf/p5310-pack-bitmaps.sh
> +++ b/t/perf/p5310-pack-bitmaps.sh
> @@ -91,4 +91,9 @@ test_perf 'pack to file (partial bitmap)' '
> git pack-objects --use-bitmap-index --all pack2b </dev/null >/dev/null
> '
>
> +test_perf 'rev-list with tree filter (partial bitmap)' '
> + git rev-list --use-bitmap-index --count --objects --all \
> + --filter=tree:0 >/dev/null
> +'
> +
> test_done
