SPServer is a high concurrency C++ server framework library that implements the Half-Sync/Half-Async and the Leader/Follower thread pool patterns. It is based on libevent (Unix/Linux) and IOCP (Win32) in order to utilize the best I/O loop on any platform. It supports SSL for secure transactions. An SSL proxy, sptunnel, is included along with an embedded HTTP server framework, sphttp. License: GNU Lesser General Public License (LGPL) Changes: The performance of the demo programs was improved. A Win32 IOCP-based server framework was added.

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