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    SubjectRe: and nicer too - Re: [PATCH] epoll more scalable than poll
    On Fri, 1 Nov 2002, Dan Kegel wrote:

    > Davide Libenzi wrote:
    > >>Do you avoid the cost of epoll_ctl() per new fd?
    > >
    > > Jamie, the cost of epoll_ctl(2) is minimal/zero compared with the average
    > > life of a connection.
    >
    > Depends on the workload. Where I work, the http client I'm writing
    > has to perform extremely well even on 1 byte files with HTTP 1.0.
    > Minimizing system calls is suprisingly important - even
    > a gettimeofday hurts.

    Dan, is it _one_ gettimeofday() or a gettimeofday() inside a loop ?
    gettimeofday() is of the order of few microseconds ... and If your clients
    works with anything alse than a loopback, few microseconds shouldn't weigh
    in much compared to connect/send/recv/close on a network connection. It is
    not much the fact that you transfer one byte, it's the whole TCP handshake
    cost that weighs in.



    - Davide


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