Phpmole suffers from multitasking problems when doing http calls doing scp/ssh 'exec()' calls monitoring sockets (for debugging) reading large directories Theading is better than forking for memory and speed. No memory replication occurs by default. biggest memory duplication would have been php.exe (4Mb or 1Mb stripped)! Gtk does not work well with forking (2 forks can not access the interface!)