%
%
%

C = rand(40000,4);
Q = rand(4000,4);

disp ('C-Q');
disp ('build-in')
tic; [i1, d1] = knnsearch(C, Q, 'k', 4); toc
disp ('mine')
tic; [i2, d2] = knnsearch2(C, Q, 4); toc
sum(i1-i2)
sum(d1-d2)

disp (' ');
disp (' ');
disp ('C-C');
disp ('build-in')
tic; [i1, d1] = knnsearch(C, C, 'k', 4); toc
disp ('mine')
tic; [i2, d2] = knnsearch2(C, C, 4); toc
sum(i1-i2)
sum(d1-d2)