From 61b55c88dae27279ffe825a2ef69024af78f4874 Mon Sep 17 00:00:00 2001
From: Anna Larch <anna@nextcloud.com>
Date: Mon, 15 Aug 2022 20:27:02 +0200
Subject: [PATCH] performance optimisation for carddav backend blob data read

Signed-off-by: Anna Larch <anna@nextcloud.com>
---
 apps/dav/lib/CardDAV/CardDavBackend.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/dav/lib/CardDAV/CardDavBackend.php b/apps/dav/lib/CardDAV/CardDavBackend.php
index a9ca2eb30a3c9..6b60d6701d47a 100644
--- a/apps/dav/lib/CardDAV/CardDavBackend.php
+++ b/apps/dav/lib/CardDAV/CardDavBackend.php
@@ -933,6 +933,12 @@ private function readBlob($cardData, &$modified = false) {
 			$cardData = stream_get_contents($cardData);
 		}
 
+		// Micro optimisation
+		// don't loop through
+		if (strpos($cardData, 'PHOTO:data:') === 0) {
+			return $cardData;
+		}
+
 		$cardDataArray = explode("\r\n", $cardData);
 
 		$cardDataFiltered = [];
@@ -956,7 +962,6 @@ private function readBlob($cardData, &$modified = false) {
 
 			$cardDataFiltered[] = $line;
 		}
-
 		return implode("\r\n", $cardDataFiltered);
 	}