Hi on average is 7.3x faster than stock PHP and 2x faster than Facebook's HHVM. Please check our benchmarks.
Hi is aimed at being 100% compatible with Zend PHP
PyPy proven technology guarantees high levels of stability
coming soon: a bridge to call Python from PHP
Relative speedup vs PHP, lower is better, normalized to Zend PHP 5.5.0
Hi is an implementation of the PHP language using PyPy technology. It started off as a research project by Maciej Fijałkowski for Facebook, and was later expanded. As of now, it contains a reasonably fast and complete implementation of core the PHP language, including implementation of many PHP's builtin modules (though not all, yet). At present it does not include a reasonable web server integration, so it's not usable for use in production in the current form.
Hi is being developed by Baroque Software, experts in the area of virtual machines.