[Mono-dev] Mono SIMD Function Declarations and Timing

[Rodrigo Kumpera]

Mono.Simd requires mono version 2.2 or above. Testing against 2.0.1 won't
help. And it must be done with a 32 bits version of mono, which is all we
support
right now - amd64 is coming in 2.4.



On Fri, Nov 21, 2008 at 12:17 PM, JTalton <talton at gmail.com> wrote:

>
> Testing:
>  Array of 10000000 vectors performing different Add declarations across
> those vectors.
>  Test run 10 times and average of runs taken. (Looking at data, timing is
> consistent between runs)
>  Executable was built on Windows using VS2008 with the project settings set
> to .NET 2.0 - Release
>  VC - Vector Class
>  VS - Vector Struct
>  Arrays were initiailized before any tests were run.
>
> .NET 2.0 - Windows XP - 18 Seconds
> 1.000 VS: void Add(ref VS a)
> 1.018 VS: void Add(VS a)
> 1.035 VS: void Add(ref VS a, out VS result)
> 1.052 VS: void Add(VS a, out VS result)
> 1.163 VC: void Add(VC a)
> 1.374 VS: static void Add(VS a, VS b, out VS result)
> 2.543 VC: static void Add(VC a, VC b, out VC result)
> 2.250 VC: static VC operator +(VC a, VC b)
> 2.259 VC: static VC Add(VC a, VC b)
> 2.594 VC: void Add(VC a, out VC result)
> 2.668 VS: static VS operator +(VS a, VS b)
> 2.700 VS: static VS Add(VS a, VS b)
>
> Mono 2.0.1 - Windows XP - 63 Seconds
>  1.000 VS: void Add(ref VS a)
>  1.123 VS: void Add(ref VS a, out VS result)
>  1.281 VC: void Add(VC a)
>  1.670 VS: void Add(VS a)
>  1.786 VS: void Add(VS a, out VS result)
>  2.628 VS: static void Add(VS a, VS b, out VS result)
>  2.857 VS: static VS operator +(VS a, VS b)
>  2.859 VS: static VS Add(VS a, VS b)
> 12.895 VC: static VC Add(VC a, VC b)
> 13.223 VC: void Add(VC a, out VC result)
> 13.242 VC: static void Add(VC a, VC b, out VC result)
> 13.453 VC: static VC operator +(VC a, VC b)
>
> Mono 1.9.1 - Ubuntu 8.10 Live CD
> 1.000 VS: void Add(ref VS a)
> 1.106 VS: void Add(ref VS a, out VS result)
> 1.294 VC: void Add(VC a)
> 1.669 VS: void Add(VS a)
> 2.101 VS: void Add(VS a, out VS result)
> 2.111 VS: static void Add(VS a, VS b, out VS result)
> 2.694 VS: static VS Add(VS a, VS b)
> 3.105 VS: static VS operator +(VS a, VS b)
> 5.007 VC: static VC Add(VC a, VC b)
> 5.126 VC: void Add(VC a, out VC result)
> 5.280 VC: static void Add(VC a, VC b, out VC result)
> 5.287 VC: static VC operator +(VC a, VC b)
>
> I agree that there is nothing new here.  I just wanted to point the
> performance implications of the function declarations out so that when the
> function declarations are decided on, it would be taken into consideration.
> --
> View this message in context:
> http://n2.nabble.com/Mono-SIMD-Function-Declarations-and-Timing-tp1559946p1561887.html
> Sent from the Mono - Dev mailing list archive at Nabble.com.
>
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