add benchmark

day-01/benchmark

@@ -0,0 +1,6 @@
+goos: linux
+goarch: amd64
+pkg: github.com/onyx-and-iris/aoc2024/day-01
+cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
+BenchmarkMain-12    	1000000000	         0.001628 ns/op
+ok  	github.com/onyx-and-iris/aoc2024/day-01	0.015s

day-01/main_internal_test.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"os"
+	"testing"
+)
+
+func BenchmarkMain(b *testing.B) {
+	os.Stdout, _ = os.Open(os.DevNull)
+	main()
+}