func testing.predictN

3 uses

	testing (current package)
		benchmark.go#L301: func predictN(goalns int64, prevIters int64, prevns int64, last int64) int {
		benchmark.go#L353: 				n = int64(predictN(goalns, prevIters, b.duration.Nanoseconds(), last))
		benchmark.go#L404: 	b.loop.n = uint64(predictN(goalns, prevIters, t.Nanoseconds(), prevIters))