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    SubjectRe: Is sendfile all that sexy?
    From
    [Felix von Leitner]
    > I don't know how Linux does it, but returning the first free file
    > descriptor can be implemented as O(1) operation.

    How exactly? Maybe I'm being dense today. Having used up the lowest
    available fd, how do you find the next-lowest one, the next open()? I
    can't think of anything that isn't O(n). (Sure you can amortize it
    different ways by keeping lists of fds, etc.)

    Peter
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