Hi, With this mail I would like to ping the original problem with the second patch I send to the list. This patch doesn't have the likely original problems of potentially changing the lock behavior to a spin lock, but provides all the performance improvements anyway.
It just replaces the Windows inter-proces mutex in the apr code with the
already existing apr-mutex implementation, which is usually implemented as
the far more efficient Windows in-process Critical section.
This makes the implementation 10* to 140* times more efficient on Windows
and more similar to the performance on other platforms. A performance fix
like this is critical for Subversion, or we would have to implement our own
r/w locking implementation for our caching infrastructure.
Bert
apr-rwlock-AprMutex.patch
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