src/Statsd/Listener.php
private function dispatchRequestTime(PostResponseEvent $event)
    {
        $request   = $event->getRequest();
        $startTime = $request->server->get('REQUEST_TIME_FLOAT', $request->server->get('REQUEST_TIME'));
        $time      = microtime(true) - $startTime;
        $time      = round($time * 1000);

        $this->eventDispatcher->dispatch(
            'statsd.time',
            new StatsdEvent($time)
        );
    }
private function dispatchRequestTime(PostResponseEvent $event)
    {
        $request   = $event->getRequest();
        $startTime = $request->server->get('REQUEST_TIME_FLOAT', $request->server->get('REQUEST_TIME'));
        $time      = microtime(true) - $startTime;
        $time      = round($time * 1000);

        $this->eventDispatcher->dispatch(
            'statsd.time',
            new StatsdEvent($time)
        );
    }
dispatchRequestTime dispatch the request time.
This time is a "fake" one, because some actions are performed before the initialization of the request
It is ~100ms smaller than the real kernel time.

@param PostResponseEvent $event