KPHP takes your PHP source code and converts it to a *C++ equivalent*, then compiles the generated C++ code and runs it within an embedded HTTP server. You could call KPHP a transpiler, but we call it a compiler.
Take a look at the [*benchmarks page*](https://vkcom.github.io/kphp/kphp-language/kphp-vs-php/benchmarks.html) comparing KPHP and PHP performance. You can also refer to [*PHP vs KPHP vs C++*](https://vkcom.github.io/kphp/various-topics/walk-through-php-kphp-cpp.html).
*[GitHub page](https://github.com/vkcom/kphp)* | *[Web-site (documentation)](https://vkcom.github.io/kphp/)*