Use PECL extension PhpRedis as primary and predis5.2.php only as fallback

> apt-get install php5-redis

Will install http://pecl.php.net/package/redis The documentation can be found at https://github.com/nicolasff/phpredis/#readme

On my small VPS It brought the loading time even more.

Before:
0.00935

After:
0.00092
0.00055
0.00121
0.00077