symfony
diff --git a/‎src/Symfony/Component/Process/CHANGELOG.md
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diff --git a/‎src/Symfony/Component/Process/Process.php
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@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+5.1.0
+-----
+
+ * added `Process::getStartTime()` to retrieve the start time of the process as float
+
 5.0.0
 -----
 
 
@@ -1208,6 +1208,18 @@ public function checkTimeout()
         }
     }
 
+    /**
+     * @throws LogicException in case process is not started
+     */
+    public function getStartTime(): float
+    {
+        if (!$this->isStarted()) {
+            throw new LogicException('Start time is only available after process start.');
+        }
+
+        return $this->starttime;
+    }
+
     /**
      * Returns whether TTY is supported on the current operating system.
      */