Facebook has announced
the release of its "HipHop" tool under the PHP license. "HipHop for
PHP isn't technically a compiler itself. Rather it is a source code
transformer. HipHop programmatically transforms your PHP source code into
highly optimized C++ and then uses g++ to compile it. HipHop executes the
source code in a semantically equivalent manner and sacrifices some rarely
used features - such as eval() - in exchange for improved
performance. HipHop includes a code transformer, a reimplementation of
PHP's runtime system, and a rewrite of many common PHP Extensions to take
advantage of these performance optimizations.
" These optimizations
are said to double the speed of PHP code.
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