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Re: Generalized Eisenstein Fermats

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  • Michael Angel
    ... the ... prime ... 40 times ... ... W2k has a Kernel level video subsystem. Try pfgw screenlog.txt It may eliminate that video slow down.
    Message 1 of 37 , Oct 28, 2002
      --- In primenumbers@y..., mikeoakes2@a... wrote:
      > In a message dated 28/10/02 10:43:35 GMT Standard Time,
      > d.broadhurst@o... writes:
      >
      >
      > > I know that you think that Pfgw's -f100{} spends
      > > too long on the modular sieve and set -fx{} with x
      > > smaller than 100% (of Jim's default). A larger value of C
      > > would then indicate a smaller value of x. Indeed it may be that
      > > Jim's -f100 is roughly optimized for C=1, so if I was working
      > > with C=20 I'd be tempted to use only 5% of Jim-strength: -f5{}.
      > >
      >
      > Yes, I used -f15 throughout, in fact, as some sort of compromise.
      > But for much of the exercise the run-time was actually governed by
      the
      > bottleneck of Windoze outputting the millions of "this isn't a
      prime"
      > messages to the screen. Would you believe that Win98(me) is about
      40 times
      > slower than Win2000(Professional) at doing this?
      ...

      W2k has a Kernel level video subsystem. Try 'pfgw <blah> >
      screenlog.txt'

      It may eliminate that video slow down.

      Michael
    • Michael Angel
      ... the ... prime ... 40 times ... ... W2k has a Kernel level video subsystem. Try pfgw screenlog.txt It may eliminate that video slow down.
      Message 37 of 37 , Oct 28, 2002
        --- In primenumbers@y..., mikeoakes2@a... wrote:
        > In a message dated 28/10/02 10:43:35 GMT Standard Time,
        > d.broadhurst@o... writes:
        >
        >
        > > I know that you think that Pfgw's -f100{} spends
        > > too long on the modular sieve and set -fx{} with x
        > > smaller than 100% (of Jim's default). A larger value of C
        > > would then indicate a smaller value of x. Indeed it may be that
        > > Jim's -f100 is roughly optimized for C=1, so if I was working
        > > with C=20 I'd be tempted to use only 5% of Jim-strength: -f5{}.
        > >
        >
        > Yes, I used -f15 throughout, in fact, as some sort of compromise.
        > But for much of the exercise the run-time was actually governed by
        the
        > bottleneck of Windoze outputting the millions of "this isn't a
        prime"
        > messages to the screen. Would you believe that Win98(me) is about
        40 times
        > slower than Win2000(Professional) at doing this?
        ...

        W2k has a Kernel level video subsystem. Try 'pfgw <blah> >
        screenlog.txt'

        It may eliminate that video slow down.

        Michael
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