From b2d365734a692c6e09a07d0190fdabf64f3a295a Mon Sep 17 00:00:00 2001
From: Robin Appelman <robin@icewind.nl>
Date: Thu, 25 Aug 2016 15:49:18 +0200
Subject: [PATCH] cache root id in mountpoint

---
 lib/private/Files/Mount/MountPoint.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/private/Files/Mount/MountPoint.php b/lib/private/Files/Mount/MountPoint.php
index 4aef340149..42b79596c9 100644
--- a/lib/private/Files/Mount/MountPoint.php
+++ b/lib/private/Files/Mount/MountPoint.php
@@ -41,6 +41,7 @@ class MountPoint implements IMountPoint {
 	protected $storage = null;
 	protected $class;
 	protected $storageId;
+	protected $rootId = null;
 
 	/**
 	 * Configuration options for the storage backend
@@ -264,7 +265,10 @@ class MountPoint implements IMountPoint {
 	 * @return int
 	 */
 	public function getStorageRootId() {
-		return (int)$this->getStorage()->getCache()->getId('');
+		if (is_null($this->rootId)) {
+			$this->rootId = (int)$this->getStorage()->getCache()->getId('');
+		}
+		return $this->rootId;
 	}
 
 	public function getMountId() {