Optimal PHP Memory Limit and MySQL Packet Size?

[swiftor]

A friend of mines vb4 install is way faster than mine, even though we have similar traffic and hosts.

I did noticed that on his admin page he had different settings for his PHP memory limit and so on. The below are mine, do any seem like they may be hindering performance?

Web Server Apache v2.2.14
PHP 5.3.1
PHP Max Post Size 64.00 MB
PHP Maximum Upload Size 64.00 MB
PHP Memory Limit 64.00 MB
MySQL Version 5.0.90-community-log
MySQL Packet Size 16.00 MB

Thanks!