It's smarter than a global lock (come on!). I would suggest reading the article which describes the implementation [1]. [1]: http://www.velox-project.eu/velox-

It's smarter than a global lock (come on!). I would suggest reading the article which describes the implementation [1]. [1]: http://www.velox-project.eu/velox-transactional-memory-stack http://www.velox-project.eu/velox-transactional-memory-stack (courtesy scott_s)