Threading doesn't increase complexity? Spoken truly like somebody who has not had to actually write, test and debug proper, high performance threaded code. Please tell me how threading doesn't increase complexity of any data structure? I may agree if you talk about php running in cli, but then the very choice of using php is arguable, you want to thread your console apps, write them in a language that is threaded. That once again brings up the point that that is not the market that is meant to be addressed. As far as your phone goes, again why would you want to run even more threads, if you have 24 threads on your system, you will configure Apache to run 24 threads, each of you which will serve a request in parallel which will make your server capable of handling significant load. As far as php side goes, it's a problem of design of the apps. Just because people decided to go through hoops to use the threaded model doesn't mean that it is any faster than writing to the same thing in event driven model, event driven way is sometimes much faster than threads. Don't blame the language, blame the poor dev who made it harder on themselves... There are plenty of big and well performing systems online that pull data from many a locations on the back end and still manage to serve it to you in less than 2 hundredth of a second without the need for threading server side code. That's because they are designed well and implemented well as a system. Finally another thing to consider is how the operating systems deal with high amounts of threads, how different architectures deal with them, while Linux is pretty good about threads, other systems have significant problems. Php is meant to run on all of them so you choose the model that works for all. Lastly I am sorry, but massively parallel architecture for general computing is still about 10 years out. That's where parallel processing design will be bore efficient and beneficial. When we have that, and programmers learn massively parallel design, maybe then we will have a need for parallel php (pphp?) for now, there is no need, only poor design.
