[Scilab-users] Matlab vs Scilab perf

[Michael Benguigui]

Yes, in a for loop..  And in some part of code i have nested loops..

Thanks again Stephane for your answer..
++
Michael

2017-03-02 16:49 GMT+01:00 Stéphane Mottelet <stephane.mottelet at utc.fr>:

> what is "i" in your example ? Is there a loop somewhere ? Matlab will be
> obviously better for this kind of explicit loop because it uses JIT
> compilation.
>
> S.
>
> Le 02/03/2017 à 16:41, Michael Benguigui a écrit :
>
> Sorry .. for sure! (and thank you for your quick answer)
> Scilab 6.0.0
>
> ++
> Michael
>
> 2017-03-02 16:33 GMT+01:00 Stéphane Mottelet <stephane.mottelet at utc.fr>:
>
>> Hello,
>>
>> Can you precise your Scilab version ? 5.5.2 ? 6.0.0 ? Or another one...
>>
>> S.
>>
>> Le 02/03/2017 à 16:29, Michael Benguigui a écrit :
>>
>> Hi all,
>> As a Scilab user, I am currently fighting to reach Matlab performance..My
>> current scilab program takes 4x more than my matlab's vesion. Here are some
>> instructions requiring some optimizations.. If you have an idea... thanks a
>> lot!
>>
>> All times are cumulative times after the execution (iterations)
>> I used the Matlab and Scilab profilers
>> tooth_psi_angle is a 70000x4 2D matrix of real numbers
>> tool.forces.cutting_forces_teeth_TCS is a 72000x4x3 matrix of real
>> numbers
>> process.fz is a scalar
>> tool.kappa is a scalar
>>
>> if tool_angle(i) < tool.pitch_angle then
>>      h_total(i) = process.fz * sin(tooth_psi_angle(i,tooth)) *
>> sin(tool.kappa);
>>
>> => Matlab:<0.01s  vs Scilab 4.8s
>>
>> ROT_LCS_TCS =[-cos(tooth_psi_angle(i,tooth))
>> -sin(tool.kappa)*sin(tooth_psi_angle(i,tooth))
>> -cos(tool.kappa)*sin(tooth_psi_angle(i,tooth));
>> sin(tooth_psi_angle(i,tooth)) -sin(tool.kappa)*cos(tooth_psi_angle(i,tooth))
>> -cos(tool.kappa)*cos(tooth_psi_angle(i,tooth)); 0 cos(tool.kappa)
>> -sin(tool.kappa)]; // result is a 3x3 matrix
>>
>> => Matlab:0.67s  vs Scilab 4s
>>
>> tool.forces.cutting_forces_teeth_TCS(i,tooth,:) = ROT_LCS_TCS*[ft;fr;fa];
>>
>> => Matlab:0.55s  vs Scilab 1.3s
>>
>> Regards
>> Michael
>>
>>
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>> Département de Génie Informatique
>> EA 4297 Transformations Intégrées de la Matière Renouvelable
>> Université de Technologie de Compiègne -  CS 60319
>> 60203 Compiègne cedex
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> Michael Benguigui, Activeeon +33 6 304 37 37 0 https://fr.linkedin.com/in/
> micha%C3%ABl-benguigui-23a85921 skype: michael.benguigui at hotmail.fr
>
> _______________________________________________
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>
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> Département de Génie Informatique
> EA 4297 Transformations Intégrées de la Matière Renouvelable
> Université de Technologie de Compiègne -  CS 60319
> 60203 Compiègne cedex
>
>
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-- 
Michael Benguigui, Activeeon
+33 6 304 37 37 0
https://fr.linkedin.com/in/micha%C3%ABl-benguigui-23a85921
skype: michael.benguigui at hotmail.fr
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