In Compilation what task performed by magento

Question

I bought many extension from somewhere.In whole document they mentioned compilation process. Basically I want to know that magento compilation , what the mean of that and what task being done by magento during compilation process..

Answer 1

Deepak,basically compilation process has been speed up the system.

By using Compilation process magento reduce Codepool files(local,community,Core),thus make system.

According compilation,magento is copy it modules core files at includes/src files. This process magento is only copy active modules code files(Core,community,local)

Good describe at flyingmana answer