Running Apache? If so, what is your server setup?

[bzcomputers]

Just trying to see what people are currently running and what seems to get them the best performance.

vBulletin version: 4.2.3
PHP Version: 5.6.29
Apache version: 2.4
Apache handler: fcgi
PHP Caching: xcache
MySQL/MariaDB & version: MariaDB 10.1.21

Any specific tweaks or mods for vB or your server that you use for speed:
Nothing that seems to do very much for me. Looking forward to trying vB 4.2.5 with support for PHP 7.0/7.1 once it comes out of beta. I know I'll need to move from xcache to probably APCu for caching, should I still stick with fcgi as the handler?

(Copy and paste to share your setup.)