var time.startNano

4 uses

	time (current package)
		time.go#L1226: 		return subMono(runtimeNano()-startNano, t.ext)
		time.go#L1236: 		return subMono(t.ext, runtimeNano()-startNano)
		time.go#L1334: var startNano int64 = runtimeNano() - 1
		time.go#L1345: 	mono -= startNano