SPServer is a high concurrency C++ server framework library that implements the Half-Sync/Half-Async and the Leader/Follower thread pool patterns. It's based on libevent(Unix/Linux) and IOCP(win32) in order to utilize the best I/O loop on any platform. An embedded HTTP server framework, sphttp, is included. The home page: spserver spserver implements the Half-Sync/Half-Async patterns. It uses a single thread to process IO (the async layer), and a thread pool to process the service logic (the sync layer, the long time duration work can be done here).