User Interfaces are often multitasking (remember copying a file and the machine hanging?)
- • PHP and PHP-GTK are 'single tasked'
- • Application freezes if you do blocking or CPU intensive calculations
- • Forking Available (on Unix), or start another instance of php.exe
- • More memory Required for Forking and exec()
- • Need for inter-process communications (signals, shm or dba)