processes() optimized parsing ps name

lib/processes.js

@@ -273,7 +273,11 @@ function processes(callback) {
     }
     if (result.substr(0, 1) !== '[') {
       let parts = result.split('/');
-      result = parts[parts.length - 1];
+      if (isNaN(parseInt(parts[parts.length - 1]))) {
+        result = parts[parts.length - 1];
+      } else {
+        result = parts[0];
+      }
     }
     return result;
   }