I'm getting ready to do a few benchmarks for a project I'm working on (PHPRouter). I mainly use it for RESTful APIs. I don't expect any crazy results, it will obviously have a little less overhead than a full fledged framework, but I want to put it up against ZF1, ZF2, CI and a few others. I'd like suggestions on other frameworks I should include and also, more importantly, what tool should I use to create these benchmarks? I know Apache has a benchmarking tool that I will be looking in to, should I use this (seems like the default)? I'm mainly after page loads per second.