Six years ago Facebook released their C++ library named Folly , it’s a large collection of reusable C++ library components that internally at Facebook are used extensively.
But many mature C++ open source libraries exist, why introduce another one ? Here’s the motivations from their website behind its utility:
Folly (acronymed loosely after Facebook Open Source Library) is a library of C++11 components designed with practicality and efficiency in mind. It complements (as opposed to competing against) offerings such as Boost and of course
std. In fact, we embark on defining our own component only when something we need is either not available, or does not meet the needed performance profile.