➕ 312 bytes. That's how large a boost::shared_mutex is on x86_64-linux-gnu. Here's why: A simple (shared) mutex on Linux could be just 4 bytes, but

➕ 312 bytes. That's how large a boost::shared_mutex is on x86_64-linux-gnu. Here's why: A simple (shared) mutex on Linux could be just 4 bytes, but