const runtime.timeHistNumBuckets

4 uses

	runtime (current package)
		histogram.go#L69: 	timeHistNumBuckets    = timeHistMaxBucketBits - timeHistMinBucketBits + 1
		histogram.go#L71: 	timeHistTotalBuckets = timeHistNumBuckets*timeHistNumSubBuckets + 2
		histogram.go#L85: 	counts [timeHistNumBuckets * timeHistNumSubBuckets]atomic.Uint64
		histogram.go#L128: 	if bucket >= timeHistNumBuckets {

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