From 4d7817df52c94922be8c31a73e797136c0d8cff0 Mon Sep 17 00:00:00 2001
From: wbob <wbob@users.noreply.github.com>
Date: Fri, 21 Dec 2018 04:14:01 +0100
Subject: [PATCH] using open_basedir will disable the realpath cache

as of PHP 7.3.0 this is unresolved, setting an open_basedir directory will disable realpath. This is slightly underdocumented (on php.net ini.core only in the comments). See https://github.com/php/php-src/blob/PHP-7.3.0/main/main.c#L1800 and https://bugs.php.net/bug.php?id=52312
---
 performance.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/performance.rst b/performance.rst
index 0fb6653b001..5abc2c490bb 100644
--- a/performance.rst
+++ b/performance.rst
@@ -103,6 +103,8 @@ such as Symfony projects, should use at least these values:
     ; save the results for 10 minutes (600 seconds)
     realpath_cache_ttl=600
 
+Note: using ``open_basedir`` will disable the realpath Cache.
+
 .. _performance-optimize-composer-autoloader:
 
 Optimize Composer Autoloader