Thanks for the sample program, why didn't I think of that myself :)

Marcus Agehall (Roxen IS) @ Pike (-) developers forum wrote:

I think they are pretty much the same, but for clarity I usually use the has_index() function instead.

I made a small testprogram for you, so that you can benchmark it youself:

int main(int argc, array(string) argv) { int len = (int)argv[1];

array x = allocate(len, random); int rpt = (int)argv[2];

int elem = -1;

werror("Running %d iterations on array of size %d\n", rpt, len);

float t = gauge { for(int i=0; i < rpt; i++) { if (search(x, elem) == -1) { ; }; } };

werror("==-1 took %fs\n", t);

t = gauge { for(int i=0; i < rpt; i++) { if (search(x, elem) < 0) { ; }; } };

werror("<0 took %fs\n", t);

t = gauge { for(int i=0; i < rpt; i++) { if (has_index(x, elem)) { ; }; } };

werror("has_index() took %fs\n", t);

return 0; }

Sample output on my machine: chromaggus:tools agehall$ pike ~/fun/search_speed.pike 471111 1000000000 Running 1000000000 iterations on array of size 471111 ==-1 took 16.390s <0 took 16.490s has_index() took 16.290s

As you can see, there are no major difference between the three..

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I pretty much figured that the optimizer would do something like that. :) I do think that side-effect free loops could be removed completly.

I love it when you make pike harder to benchmark. :-)

Sure you do. å 16362790.

Obviously it doesn't actually do anything. ;)