A fast JSON parser/generator for C++ with both SAX/DOM style API
RapidJSON is a JSON parser and generator for C++. It was inspired by RapidXml. RapidJSON is small but complete. It supports both SAX and DOM style API. The SAX parser is only a half thousand lines of code. RapidJSON is fast. Its performance can be comparable to strlen(). It also optionally supports SSE2/SSE4.2 for acceleration. RapidJSON is self-contained and header-only. It does not depend on external libraries such as BOOST.
RapidXml is an attempt to create the fastest XML parser possible, while retaining useability, portability and reasonable W3C compatibility. It is an in-situ parser with parsing speed approaching speed of strlen function executed on the same data.