From 7f9556ce1931a4021a320ef688247f846b87d2b5 Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Fri, 15 Nov 2019 16:19:43 +0100
Subject: [PATCH] [HttpKernel] dont check cache freshness more than once per
 process

---
 src/Symfony/Component/HttpKernel/Kernel.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 952d3a0b4f..47f0b49b58 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -74,6 +74,8 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     private $requestStackSize = 0;
     private $resetServices = false;
 
+    private static $freshCache = [];
+
     const VERSION = '4.4.0-DEV';
     const VERSION_ID = 40400;
     const MAJOR_VERSION = 4;
@@ -511,7 +513,9 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
         $errorLevel = error_reporting(\E_ALL ^ \E_WARNING);
 
         try {
-            if (file_exists($cachePath) && \is_object($this->container = include $cachePath) && (!$this->debug || $cache->isFresh())) {
+            if (file_exists($cachePath) && \is_object($this->container = include $cachePath)
+                && (!$this->debug || (self::$freshCache[$k = $cachePath.'.'.$this->environment] ?? self::$freshCache[$k] = $cache->isFresh()))
+            ) {
                 $this->container->set('kernel', $this);
                 error_reporting($errorLevel);