NET array is slower than list in IronPython?

For your particular question, I think the problem is boxing - in IronPython, list items (and all other variables) are stored boxed, so only boxed values are operated on. CLR Array elements are not boxed, however, and thus IronPython will have to box them when they are extracted from the array, and then unbox them on the way back in. C# can operate on the unboxed values, and has a bunch of other optimizations to make arrays fast that IronPython doesn't have.

In our projects we are trying to avoid . Net classes usage until this become really necessary. I guess that there is no any particular need to use Array for matrix multiplication since python gives you several ways to handle matrices like list, collections or numpy.

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