a function slows down my profiler: I would like to speed it up

Question

Luca Re 2024-10-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2161270-a-function-slows-down-my-profiler-i-would-like-to-speed-it-up

评论： Luca Re 2024-10-22

%{
hi, i've create a large code..
it's fast but there is a function that slows everything down for me (my application does several simulations by executing this function several times)
I want to give it a try by asking someone experienced if it can be speeded up
it's function name "Calcola_MinTrade". and in profile it's that's what slows everything down
%}
RP_bin=load('matlab_RP_bin.mat');
MinNtrad=load('matlab_Ntrades.mat');
tic
RP_bin=RP_bin.RP_bin;
Ntradess=MinNtrad.Ntradess;
period=2;
minTrades=16;
 z=find(RP_bin);
  [~,c]=size(Ntradess);
  MinNtrad=zeros(numel(z),c);
   for x=1:c
    for i=period+1:numel(z) 
          id=z(i); 
          a=Ntradess(id,x);   
          a1=a-minTrades+1;
         %%******************
           kk=z(max(1,i-period));
           if ~minTrades
                     b=kk;
           else  
             idx=find(flip(Ntradess(1:id,x))<=a1,1,'first');
             b=id-idx+1;
             b=min(b,kk);
             %%*****************
           end  
           if ~isempty(b) 
                MinNtrad(i,x)= b; 
    
           end                
     end 
   end
   
   %the function return MinNtrad
   toc
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