Go basic benchmarking

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Benchmark tests show performance profiles. In the example below, when you run go test -run none -bench ., it will show values like the time it took for each operation (e.g., 51.68 ns/op)

func BenchmarkTest1(b *testing.B) {
	var str string
	for j := 0; j < b.N; j++ {
		str = fmt.Sprint("ola")
	}
}