exposed another stat method

core/src/main/java/hudson/model/Executor.java

@@ -403,6 +403,15 @@ public class Executor extends Thread implements ModelObject {
         return System.currentTimeMillis() - startTime;
     }
 
+    /**
+     * Returns the number of milli-seconds the currently executing job spent in the queue
+     * waiting for an available executor. This excludes the quiet period time of the job.
+     * @since 1.440
+     */
+    public long getTimeSpentInQueue() {
+        return startTime - workUnit.context.item.buildableStartMilliseconds;
+    }
+
     /**
      * Gets the string that says how long since this build has started.
      *