// by clearing garbage from previous runs.
	runtime.GC()
	b.resetRaces()
	b.N = n
	b.parallelism = 1
	b.ResetTimer()
	b.StartTimer()
	b.benchFunc(b)
	b.StopTimer()
	b.previousN = n
	b.previousDuration = b.duration
}

// run1 runs the first iteration of benchFunc. It reports whether more
// iterations of this benchmarks should be run.
func (b *B) run1() bool {
	if ctx := b.context; ctx != nil {

		(indexSizes[len(indexSizes)-1]+len(benchmarkString)-1)/len(benchmarkString))
	benchFunc := func(b *testing.B, benchStr string) {
		b.SetBytes(int64(len(benchStr)))
		for i := 0; i < b.N; i++ {
			Count(benchStr, "=")
		}
	}
	for _, size := range indexSizes {
		b.Run(fmt.Sprintf("%d", size), func(b *testing.B) {
			benchFunc(b, benchStr[:size])
		})
	}

}