Add CPU profiler section

guide/cpu-utilization.go

@@ -0,0 +1,24 @@
+// +build ignore
+
+package main
+
+import (
+	"os"
+	"runtime/pprof"
+	"time"
+)
+
+func main() {
+	pprof.StartCPUProfile(os.Stdout)
+	defer pprof.StopCPUProfile()
+
+	go cpuHog()
+	go cpuHog()
+
+	time.Sleep(time.Second)
+}
+
+func cpuHog() {
+	for {
+	}
+}