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+---
+tags:
+  - golang
+  - howto
+---
+Simple timing can be done using the time package.
+```
+import time
+import fmt
+
+func main() {
+	start := time.Now()
+	elapsed = time.Since(start).Seconds()
+	fmt.Printf("%.2fs", elapsed)
+}
+```
+
+Writing benchmarks. They look similar to tests:
+```
+import testing
+
+func BenchmarkSome(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		Some()
+	}
+}
+```
+b.N is supplied by test driver and is dynamically changed depending on runtime.
+
+`go test -bench=<regex>`
+
+This just benchmarks a function being called many times, comparative benchmarks can be written using a regular function being called from Benchmarks, something like so :
+```
+import testing
+
+func doBench(b *testing.B, size int) { ... vary inputs size }
+func Bench1(b *testing.B)
+func Bench10(b *testing.B)
+func Bench100(b * testing.B)
+```
+\ No newline at end of file