See vec. By using bitstrings instead of bytestrings, your masks will be 1/8th the size (and the boolean operations a lot faster).

With a million random generated intervals, using bytestrings consumed nearly 2 GB and 80+ seconds; the same intervals using bitstrings only 0.6GB and 40 seconds. 

C:\test>797136-a -INTERVALS=1e6
Check mem: 1.975 GB ( 82 seconds )

C:\test>797136-b -INTERVALS=1e6
Check mem: 0.616 GB ( 44 seconds )

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BTW: Yourcodewouldbealoteasiertoreadandeditifitcontained a few spaces!

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
RIP PCW It is as I've been saying!(Audio until 20090817)

In reply to Re: boolean calculation with very large data by BrowserUk
in thread boolean calculation with very large data by llancet

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