obtain goroutine id outside go runtime. linux/amd64 go1.6
#benchmark go test -bench=. PASS BenchmarkGoid-2 2000000000 2.04 ns/op
obtain goroutine id outside go runtime. linux/amd64 go1.6
#benchmark go test -bench=. PASS BenchmarkGoid-2 2000000000 2.04 ns/op