Most MySQL drivers (and database drivers in general) are _synchronous_, i.e. the execution of a script is blocked until having connected to the database or having obtained the result of a query. This is often unacceptable for highload services, since one probably wants the script do something useful...

NetMQ is an industrial-strength, high-performance implementation of the Advanced Messaging Queueing Protocol (AMQP.) NetMQ is written in the C programming language for use on POSIX-compliant systems. The NetMQ system consists of a server progam, a client program which allows interaction with the s...