From b497067ead79d617a09d081f580b1cd930fcb771 Mon Sep 17 00:00:00 2001
From: Joas Schilling <coding@schilljs.com>
Date: Wed, 23 Sep 2020 12:14:31 +0200
Subject: [PATCH] Log a warning if a "lazy" initial state loads longer than 1
 second

Signed-off-by: Joas Schilling <coding@schilljs.com>
---
 lib/private/InitialStateService.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/private/InitialStateService.php b/lib/private/InitialStateService.php
index 55ce9c4172..c74eb683bd 100644
--- a/lib/private/InitialStateService.php
+++ b/lib/private/InitialStateService.php
@@ -72,7 +72,17 @@ class InitialStateService implements IInitialStateService {
 	private function invokeLazyStateCallbacks(): void {
 		foreach ($this->lazyStates as $app => $lazyStates) {
 			foreach ($lazyStates as $key => $lazyState) {
+				$startTime = microtime(true);
 				$this->provideInitialState($app, $key, $lazyState());
+				$endTime = microtime(true);
+				$duration = $endTime - $startTime;
+				if ($duration > 1) {
+					$this->logger->warning('Lazy initial state provider for {key} took {duration} seconds.', [
+						'app' => $app,
+						'key' => $key,
+						'duration' => round($duration, 2),
+					]);
+				}
 			}
 		}
 		$this->lazyStates = [];