fix(MemcachedFactory): Enable TCP_NODELAY and adjust default timeouts to be reasonable

Signed-off-by: David Dreschner <david.dreschner@nextcloud.com>

Author: DerDreschner

lib/private/Memcache/Memcached.php

@@ -25,11 +25,13 @@ public function __construct($prefix = '') {
 			self::$cache = new \Memcached();
 
 			$defaultOptions = [
-				\Memcached::OPT_CONNECT_TIMEOUT => 50,
-				\Memcached::OPT_RETRY_TIMEOUT => 50,
-				\Memcached::OPT_SEND_TIMEOUT => 50,
-				\Memcached::OPT_RECV_TIMEOUT => 50,
-				\Memcached::OPT_POLL_TIMEOUT => 50,
+				// Set connect and polling timeouts to 500 milliseconds
+				\Memcached::OPT_CONNECT_TIMEOUT => 500,
+				\Memcached::OPT_POLL_TIMEOUT => 500,
+
+				// Set send and receive timeouts to 500000 microseconds
+				\Memcached::OPT_SEND_TIMEOUT => 500000,
+				\Memcached::OPT_RECV_TIMEOUT => 500000,
 
 				// Enable compression
 				\Memcached::OPT_COMPRESSION => true,
@@ -39,6 +41,9 @@ public function __construct($prefix = '') {
 
 				// Enable Binary Protocol
 				\Memcached::OPT_BINARY_PROTOCOL => true,
+
+				// Disable Nagle algorithm to speed up connection
+				\Memcached::OPT_TCP_NODELAY => true,
 			];
 			/**
 			 * By default enable igbinary serializer if available