twosums$ go test -bench=. -run=none -benchmem .
goos: linux
goarch: amd64
BenchmarkTwoSum1-8   	14698284	       149 ns/op	      16 B/op	       1 allocs/op
BenchmarkTwoSum2-8   	 7724497	       138 ns/op	      16 B/op	       1 allocs/op
PASS
ok  	_/home/kostix/tmp/twosums	3.508s