ReaderWriterLock vs. ReaderWriterLockSlim Performance

Here is handy comparison of the performance ReaderWriterLock and ReaderWriterLockSlim:

ReaderWriterLock

ReadLock -> Release Lock = 0.00014 ms

WriteLock -> ReleaseLock = 0.00012 ms

ReadLock -> UpgradeToWriteLock -> ReleaseLock = 0.00021 ms

ReaderWriterLockSlim

ReadLock -> ExitReadLock = 0.00005 ms

WriteLock -> ExitWriteLock= 0.00004 ms

ReadLockUpgradeable -> WriteLock -> ExitWriteLock -> ExitReadLock  = 0.00009 ms

So it appears that the ReaderWriterLockSlim is approximately ~3 times faster in most cases.

Note: I came up with these number by writing a c# console App (.net 4.0) which aquired/released locks in a for loop 1,000,000 times with a StopWatch measuring the time taken.

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