Java SE 6 Performance White Paper

Java SE 6 Performance White Paper.

Особенно обратите внимание на
2.1.1 Biased Locking
2.1.2 Lock Coarsening
2.1.3 Adaptive Spinning

For more on Biased Locking, please refer to the ACM OOPSLA 2006 paper by Kenneth Russell and David Detlefs: "Eliminating Synchronization-Related Atomic Operations with Biased Locking and Bulk Rebiasing".