Vjson - claims to be fastest json parser written in c++

I'm confused. json.cpp is pure C code with custom atoi and atof implementations. block_allocator.cpp uses malloc and free with reinterpret_cast and some STL (max and swap).

The other C++ is in main, which can of course be ignored if this is embedded into another system.

It's clean code, very easy to follow, and probably works great, but why isn't it just written purely in C? Wouldn't that be faster and smaller?

How about, you know, a benchmark against yajl? :)

Also, it's easy to be fast and incorrect, as the page outlines under "cons".