Yeah it's mostly the kind of micro optimization stuff that really isn't going to be to large a percentage of your time in a web app, assuming that you are proba

Yeah it's mostly the kind of micro optimization stuff that really isn't going to be to large a percentage of your time in a web app, assuming that you are probably waiting on queries. Then when it does really matter your probably at the scale where you want to ditch PHP for the specific stuff you are doing that is CPU bound. Kind of like Twitter is having to do with Rails.