From: "Robert I. Eachus" <eachus@mitre.org>
Subject: Re: Ada95 speed
Date: 1999/06/03
Date: 1999-06-03T00:00:00+00:00 [thread overview]
Message-ID: <3756E159.C40F6B45@mitre.org> (raw)
In-Reply-To: 310519991456230875%hopperj@macconnect.com
"James E. Hopper" wrote:
> your comment that new machines are not faster than old because you have
> to do clever tricks to make them work is way off the mark. unless you
> went through it you have NO idea what gyrations we went through to make
> code run fast on those older machines.
A number of tricks not mentioned here:
Where the map is "smooth" outside the Mandelbrot set, follow the
boundaries of the area and don't compute the enclosed points. (But you
have to find a closed boundary.)
For points that are inside the set, it helps to terminate the
iteration, not just at a set number of iterations, but if you compute a
value inside the head or body of the "bug." Actually, inside circles
which are entirely inside the set. Remember the entire set is
connected.
Another method, which is handy for when you are focused into a very
tiny area of the set, is to compute the derivitive of the function at a
point then trace countour lines that way.
--
Robert I. Eachus
with Standard_Disclaimer;
use Standard_Disclaimer;
function Message (Text: in Clever_Ideas) return Better_Ideas is...
next prev parent reply other threads:[~1999-06-03 0:00 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <374182F2.B10AD449@Maths.UniNe.CH>
1999-05-18 0:00 ` Ada95 speed Tom Moran
1999-05-18 0:00 ` Gautier
1999-05-19 0:00 ` Robert Dewar
1999-05-20 0:00 ` Clifford J. Nelson
1999-05-20 0:00 ` Tucker Taft
1999-05-20 0:00 ` Tom Moran
1999-05-20 0:00 ` Tom Moran
1999-05-21 0:00 ` Tom Moran
1999-05-31 0:00 ` James E. Hopper
1999-06-01 0:00 ` Clifford J. Nelson
1999-06-01 0:00 ` James E. Hopper
1999-06-02 0:00 ` Robert Dewar
1999-06-04 0:00 ` Clifford J. Nelson
1999-06-05 0:00 ` Robert Dewar
1999-06-01 0:00 ` Clifford J. Nelson
1999-06-01 0:00 ` James E. Hopper
1999-06-02 0:00 ` Clifford J. Nelson
1999-06-04 0:00 ` Clifford J. Nelson
1999-06-02 0:00 ` Robert Dewar
1999-06-04 0:00 ` Clifford J. Nelson
1999-06-04 0:00 ` Ole-Hjalmar Kristensen
1999-06-04 0:00 ` David C. Hoos, Sr.
1999-06-02 0:00 ` James E. Hopper
1999-06-02 0:00 ` Clifford J. Nelson
1999-06-02 0:00 ` James E. Hopper
1999-06-02 0:00 ` Clifford J. Nelson
1999-06-02 0:00 ` Gautier
1999-06-02 0:00 ` John B. Matthews, M.D.
1999-06-03 0:00 ` Ada95 speed (wandering off topic slightly) Dale Stanbrough
1999-06-03 0:00 ` Larry Kilgallen
1999-06-04 0:00 ` Aidan Skinner
1999-06-02 0:00 ` Ada95 speed John B. Matthews, M.D.
1999-06-02 0:00 ` Clifford J. Nelson
1999-06-03 0:00 ` Robert I. Eachus [this message]
1999-05-31 0:00 ` Gautier
1999-05-19 0:00 ` Robert Dewar
1999-05-18 0:00 Clifford J. Nelson
1999-05-17 0:00 ` David Starner
1999-05-18 0:00 ` Clifford J. Nelson
1999-05-18 0:00 ` Florian Weimer
1999-05-18 0:00 ` Tucker Taft
1999-05-18 0:00 ` Clifford J. Nelson
1999-05-18 0:00 ` Larry Kilgallen
1999-05-20 0:00 ` Tom Moran
1999-05-21 0:00 ` Clifford J. Nelson
1999-05-21 0:00 ` Tom Moran
1999-05-21 0:00 ` Clifford J. Nelson
1999-05-21 0:00 ` Tom Moran
-- strict thread matches above, loose matches on Subject: below --
1999-06-05 0:00 tmoran
1999-06-05 0:00 ` Al Christians
1999-06-05 0:00 ` David C. Hoos, Sr.
1999-06-05 0:00 tmoran
1999-06-05 0:00 ` Robert Dewar
1999-06-05 0:00 ` Ehud Lamm
1999-06-05 0:00 ` William Starner
1999-06-05 0:00 ` Ehud Lamm
1999-06-05 0:00 ` Clifford J. Nelson
1999-06-06 0:00 ` David Botton
1999-06-06 0:00 ` Ehud Lamm
1999-06-07 0:00 ` Robert Dewar
1999-06-07 0:00 ` Ehud Lamm
1999-06-06 0:00 tmoran
1999-06-06 0:00 ` David C. Hoos, Sr.
1999-06-06 0:00 ` tmoran
1999-06-07 0:00 ` Robert Dewar
1999-06-06 0:00 ` Brian Rogoff
1999-06-06 0:00 ` David C. Hoos, Sr.
1999-06-07 0:00 ` Robert Dewar
1999-06-06 0:00 tmoran
1999-06-06 0:00 ` Robert Dewar
1999-06-07 0:00 Robert I. Eachus
1999-06-07 0:00 ` tmoran
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