[Scilab-users] Matlab vs Scilab perf

[Stéphane Mottelet]

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 
> <mailto: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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-- 
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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