On Mar 3, 2010, at 7:45 AM, Dr. David Kirkby wrote:
William Stein wrote:
On Tue, Mar 2, 2010 at 7:56 PM, Dr. David Kirkby
<david.kir...@onetel.net> wrote:
Right now it takes over 1.5 seconds every time.
wst...@sage:~$ time sage -c "print factor(2010)"
2 * 3 * 5 * 67
real 0m1.535s
user 0m1.140s
sys 0m0.460s
Personaly I don't find that too excessive for a large tool. How
long does
Gimp take to start?
That's irrelevant. What matters is how long Maple, Mathematica,
Matlab, Maxima, Pari, and Magma take to start.
After repeatedly running the command on sage.math, this is how
things stabilize:
Pari 0.030s
Python 0.046s
Maple 0.111s
Maxima 0.456s
Mathematica 0.524s
Matlab 0.844s
Magma 0.971s
Sage 1.658s
Fair point.
Personally I have a bit of a problem understanding why I need to
worry about a program starting up in less than 2 s, when I might run
something on it which will take at least one order of magnitude
longer, and probably several order of magnitudes longer.
I often run things that take an order of magnitude less time to run--
e.g. I'm reading a paper and want to try out a quick example to get a
feel for something, or to factor (or even multiply) several digit
numbers. It also makes it prohibitive to be used as a (non-persistent)
web-service backend. I think partially it's a perception thing--one
could argue the same about a web page--why should I worry about it
taking 2 seconds to load/render if I'm going to spend an order of
magnitude more time reading it? Also, on that note, people's very
first exposure to Sage is waiting for it to start up--we don't want
that to be memorable :)
On Mar 3, 2010, at 9:12 AM, Florent Hivert wrote:
I'm always surprised that they are many thing that I won't ever use
that are
imported at the top level of sage. Shouldn't we clean up what is
imported and
what is not imported by default and make it easy to import bunch of
thing.
Once things are in the global namespace, it'll break peoples code to
pull it back out. I don't think we should just dump everything we can
there though.
For example, Many people certainly don't care about many stuff in
combinatorics. Shouldn't we import by default very basic thing
(permutations
and cartesian_product) and let the user who is interested in
combinatorics
write the from sage.combinat import * ?
My 2 cents, which has probably already been discussed before...
I think we can have the names there without importing all the code
behind everything. With tab completion, a huge global namespace isn't
that bad.
- Robert
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