On 06/09/2020 11:04, Pancho wrote:
> On 04/09/2020 10:35, druck wrote:
>> I'd say that from what I'm doing the Mono CIL on AMD64 is between 1.5x
>> and 8x slower. For computational intensive stuff probably about 4x.
>> Half that on the Windows CLR.
>>
>
> That surprises me, my memory from circa 2003 was that C# numerical stuff
> ran at about the same speed as C++, my memory is poor to exact details,
> I would have probably have categorized 80% as the same speed. I would
> have probably tested using some type of numerical integration routine.
>
> I don't know how you tested, I do remember there was a performance
> penalty gotcha from switching between managed and unmanaged code.

Just managed code.

We did have a mono project that had a huge problem with garbage
collection (either of the gc's) when mixing managed and unmanaged code,
as unmanaged data got stuck in the heap causing it to fragment and
continually grow. It ended up being slower and more prone to falling
over than the Python prototype. RK will remember that one.

---druck

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