Details
Trivial Description
The numbers at http://wiki.apache.org/db-derby/Derby1961MethodCalls indicate that ContainerLock.isCompatible() is called many times per transaction, at least when there are multiple concurrent clients operating on the same containers. Currently, it looks into a two-dimensional array to find out whether two locks are compatible. This could be implemented more efficiently, for instance by having a bit pattern in each ContainerLock object representing which lock types it is compatible with.