thanks for your patience moxliukas, but this is what i have been doing, and I dont get a total count, I get a list of presence / absence numbers instead e.g. 00000000000100000000000000010000000000000000001000000000001
Comment on Re: Re: Re: Re: how can I speed up this perl??
Could you post the code, then, because this ought to be working. A couple quick things to check: you are ++'ing the value (not just setting it to 1 or something).