Hip Hop PHP

[thachp]

Woo hoo! Finallly....

HipHop transforms your PHP source code into highly optimized C++ and
then compiles it with g++ to build binary files. You keep coding in
simpler PHP, then HipHop executes your source code in a semantically
equivalent manner and sacrifices some rarely used features – such as
eval() – in exchange for improved performance.

http://wiki.github.com/facebook/hiphop-php/