[Mono-bugs] [Bug 594286] IList<int> is very slow compare to .net

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Wed Apr 7 08:33:43 EDT 2010



Rodrigo Kumpera <rkumpera at novell.com> changed:

           What    |Removed                     |Added
                 CC|                            |rkumpera at novell.com

--- Comment #1 from Rodrigo Kumpera <rkumpera at novell.com> 2010-04-07 12:33:41 UTC ---
We have 2 problems here, both contributing to worse performance.

Due to how we implement interface dispatch, arrays have a very high collision
rate, resulting in IMT buckets with ~36 items instead of 4-5.

The other issue is that our JIT don't perform proper static analysis and
propagate type information. Had we done it, the code could be translated
straight to a array indexing primitive.

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