Merge remote-tracking branch 'origin/dev' into dev

Author: rogeralsing

examples/remote-benchmark/node1/main.go

@@ -56,6 +56,7 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
+		defer f.Close()
 		pprof.StartCPUProfile(f)
 		defer pprof.StopCPUProfile()
 	}