Added parallel computing

lib.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log"
 	"os/exec"
+	"runtime"
 	"strings"
 	"sync"
 )
@@ -250,3 +251,14 @@ func Exec(str string, opts ...*Opts) error {
 	return nil
 
 }
+
+// Kill call OS to kill pid
+func Kill(p int) error {
+	switch runtime.GOOS {
+	case "windows":
+		return Exec(fmt.Sprintf("taskkill /T /F /PID %d", p))
+	default:
+		return Exec(fmt.Sprintf("kill -9 %d", p))
+
+	}
+}