"Or how many lookups you need to do? " about 15000000 per hour.

That's 4000 per second or 1 every 1/4 of a millisecond.

In that time you want to intersect 500 to 1000 (from 3,000) sets of 50,000 integers and extract the single most populous integer across them all.

Do you have a 3000 machine cluster available to throw at this problem?

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
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.

In reply to Re^3: Fast algorithm for 2d array queries (Got a cluster?) by BrowserUk
in thread Fast algorithm for 2d array queries by baxy77bax

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