add ops/sec
output to go bechmarks:
usage :
$ go test -bench . | benchfmt
BenchmarkFoo-4 50000 37698 ns/op 26526 ops/1s
or with additional duration param
$ go test -bench . | benchfmt -d 1h
BenchmarkFoo-4 50000 37807 ns/op 95220461 ops/1h0m0s