"The developers of the free MariaDB have issued a first release
candidate of version 5.2 (referred to as 5.2.2 gamma), which is
derived from MySQL 5.1.50. The thread programming in InnoDB has
been overhauled to increase the performance of this database
engine. Similar code can also be found in the latest release
candidate of MySQL 5.5, which also became available recently.
"The plug-in concept for authentication modules gives MariaDB
greater speed than its predecessor – however, the function is
still in development and only planned to be made available to
commercial MySQL customers"