Just a quick overview over the different lock types and their performance in .NET.
For this test, the following method was called as fast as possible for 4 seconds:
private void TestMethod() {
lock (this) { // this locking is replaced depending on the locking type
counter++;
}
}
Here are the results:
| Locking Type | Calls per second | Factor |
|---|---|---|
| No locking (fastest possible) | 470,972,276 | 19.61 |
Interlocked.CompareExchange |
62,439,529 | 2.60 |
lock keyword |
37,554,119 | 1.56 |
SpinLock (without owner tracking) |
34,489,245 | 1.44 |
ReaderWriterLockSlim with LockRecursionPolicy.NoRecursion |
25,214,451 | 1.05 |
ReaderWriterLockSlim with LockRecursionPolicy.SupportsRecursion |
24,013,488 | 1.00 |
Full source code: Program.cs