Hello everyone, I'm an old but new user of CPanel. Used to run CPanel on our servers many years ago and now we recently got a cloud VPS and chose to go with CPanel once again. Our company has developed a control panel for our clients with an API where client websites gets live content from the control panel. For this we chose the PHP framework Laravel. For those of you who are familiar with Laravel, you know it's pretty heavy framework. Setup CentOS 6.5 Apache 2.4.x PHP 5.5.x The problem On a brand new VPS, our biggest problem was time to first byte (ttfb), a single request to our API would be delayed anywhere from 500-1000ms with suExec + FastCGI + opcache (and Laravel optimized). As you can imagine this was unacceptable. We even tried to make a simple "Hello World" HTML file, renamed it to .php and this alone caused the ttfb to go from ~25ms to ~130ms .. The solution After trying tons of different settings we noticed that DSO was giving us the best results but was not secure enough with suExec, so we decided to try mod_ruid2 + DSO + opcache and the results are amazing. The "Hello World" test file went from ~130ms to <40ms Our heavy API went from 500-1000ms to <100ms That's it, I hope this info helps someone.