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function time_6(sf,dotime)

%

%   The purpose of this test is to determine whether it pays of to do

%   fewer passes through memory

%



Lr=[480000*sf^2,262144*sf^2,900*sf^2];

ar=[     600*sf,        512,       2];

Mr=[     800*sf,       1024,  600*sf];



for ii=1:length(Lr)



  L=Lr(ii);

  

  M=Mr(ii);

  a=ar(ii);

  

  g=rand(L,1);

  f=rand(L,1);

  

  [L, a, M]



  N=L/a;

  c=gcd(a,M);

  p=a/c;

  q=M/c;

  d=N/q;

  

  f=rand(L,1);

  gf=rand(p*q,c*d);

  tic;

  c1=mex_dgt_fac_4(f,gf,a,M,dotime);

  t1=toc;



  f=rand(L,1);

  gf=rand(p*q,c*d);  

  tic;

  c2=mex_dgt_fac_6(f,gf,a,M,dotime);

  t2=toc;

  

  t1/t2

  

end;