Popen worth it? in PHP Posted September 18, 2008 · Report reply I can't find a lot of info on the web about the pros and cons of using popen to help speed up a process. There are cases where somethings just have to be done one right after the other, but other things, such as web pages are often modular. Would web programs, such as CMS and Forums be faster if they used multiple popen functions to process different information at the same time? These programs often have very modular code and it seams like a page could be processed faster with the use of multiple processes. Or is there going to be very little improvement or slowing down by trying to have parallel processes in these kind of web programs? How much data crunching needs to be done to make it worth having more than one pipe?