t/perf/lib-bitmap.sh: avoid test_perf during setup

In the test_pack_bitmap() helper function, we first repack the
repository under test for consistency and to eliminate any effects from
different distributions of objects among packs.

This step is performed with test_perf, so it is repeated
$GIT_PERF_REPEAT_COUNT number of times. But we do not care about timing
this portion of the setup phase, and repeating the process does not
change the outcome.

Use test_expect_success to avoid spending time repeating an idempotent
portion of the setup for performance tests that use test_pack_bitmap().

Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ttaylorr

t/perf/lib-bitmap.sh

@@ -69,7 +69,7 @@ test_partial_bitmap () {
 }
 
 test_pack_bitmap () {
-	test_perf "repack to disk" '
+	test_expect_success "repack to disk" '
 		git repack -ad
 	'