Merge pull request #499 from leancloud/fix-high-cpu

Fix high cpu usage caused by golang/go#33565

Author: cshuaimin

commands/app.go

@@ -434,7 +434,7 @@ func Run(args []string) {
 		if !ok || disableGA == "false" {
 			args := []string{"--_collect-stats"}
 			args = append(args, c.Args()...)
-			_ = exec.Command(os.Args[0], args...).Start()
+			StartBackgroundCommand(exec.Command(os.Args[0], args...))
 		}
 		return nil
 	}

commands/start_background_command_unix.go

@@ -0,0 +1,17 @@
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package commands
+
+import (
+	"os/exec"
+	"runtime"
+	"syscall"
+)
+
+func StartBackgroundCommand(cmd *exec.Cmd) error {
+	if runtime.GOOS == "darwin" {
+		syscall.Sync() // workaround for https://github.com/golang/go/issues/33565
+	}
+	return cmd.Start()
+}

commands/start_background_command_windows.go

@@ -0,0 +1,7 @@
+package commands
+
+import "os/exec"
+
+func StartBackgroundCommand(cmd *exec.Cmd) error {
+	return cmd.Start()
+}