t.Fatalf("Merge profiles: %v", err)
			}
		}

		return metricGrowth, profileGrowth, p
	}

	testcase := func(strictTiming bool, acceptStacks [][]string, workers int, fn func() bool) func(t *testing.T) (metricGrowth, profileGrowth float64, n, value int64) {
		return func(t *testing.T) (metricGrowth, profileGrowth float64, n, value int64) {
			metricGrowth, profileGrowth, p := measureDelta(t, func() {