There are also quite a few notebook-related things taking up startup
time, which surely is unnecessary unless -notebook is on the command
line, or until the notebook() command is run?
I mostly do not use the notebook, and it looks from here as if I am
wasting 2s everytime I start up:
{{{
0.310 cell (worksheet)
0.314 worksheet (sage.server.notebook.notebook)
0.317 sage.misc.functional (sage_input)
0.319 sage_input (sage.misc.all)
0.337 sage.server.notebook.notebook (notebook.all)
0.351 notebook.all (sage.server.all)
0.352 sage.server.all (sage.all)
}}}
I may have got this all wrong, since I only discovered the -startup
option 5 minutes ago and have ignored most of its output...
John Cremona
On Oct 29, 10:57 pm, William Stein <wst...@gmail.com> wrote:
> On Thu, Oct 29, 2009 at 3:44 PM, Robert Bradshaw
>
>
>
> <rober...@math.washington.edu> wrote:
>
> > On Oct 29, 2009, at 3:39 PM, William Stein wrote:
>
> >> On Thu, Oct 29, 2009 at 3:27 PM, Jason Grout
> >> <jason-s...@creativetrax.com> wrote:
>
> >>> William Stein wrote:
> >>>> Nothing is "forbidden" yet, but we should try not to load whatever
> >>>> we
> >>>> can get away with not loading in order to improve the import time.
>
> >>> Well, it sounds like you are forbidding matplotlib and numpy being
> >>> loaded at startup, if you're making a doctest for that.
>
> >> Yes, I would like to propose forbidding it, unless we can't find a way
> >> around it.
>
> > I agree. It's gotten to the point where I'll fire up sage -python or
> > sage -ipython sometimes, just because starting sage takes too long if
> > I just want to do something trivial.
>
> Right now it takes 1.874 - 2.286 seconds on my new solid-state disk
> macbook air laptop to startup sage-4.2, and this is from a warm cache
> (i.e., the stable state after multiple starts). The first startup
> (before steady state) is about 5.5 seconds.
>
> On Linux with a local disk (sage.math) the startup time form me is
> about 1.230 seconds. The first try had the same time as subsequent
> starts, which is surprising... but I guess Linux on a box with 128GB
> RAM could be very good at disk caching.
>
> The point is that the 2 seconds should be 0.5 seconds.
>
> There are many things that caused this. I'm just looking at the
> output of "sage -startuptime" to see. One example:
>
> sage.server.all: 0.270 (sage.all)
> notebook.all: 0.268 (sage.server.all)
> sage.server.notebook.notebook: 0.239 (notebook.all)
> css: 0.025 (sage.server.notebook.notebook)
> sage.server.notebook.template: 0.025 (css)
> jinja: 0.022 (sage.server.notebook.template)
> jinja.environment: 0.021 (jinja)
> ...
> sphinx.application: 0.124 (cell)
>
> So... we're importing jinja and sphinx for the (old) notebook every
> time Sage starts, and this takes a significant amount of time. This
> is *never* used unless you actually run the notebook... in which case
> it still isn't used, since the notebook runs in its own separate
> process (and it's used by that process).
>
> The singular interface also looks like a *major* culprit:
>
> sage.interfaces.singular: 0.329 (sage.rings.ideal)
> sage.structure.sequence: 0.000 (sage.interfaces.singular)
>
> Looking, I see that a *horrendously* time consuming function called
> "generate_docstring_dictionary()" is called whenever the file
> sage/interfaces/singular.py is imported. This is completely
> pointless, and shouldn't happen until somebody actually tries to use
> the singular interface. A few lines of code would immediately reduce
> the startup time of Sage by nearly a half second there.
>
> Since this Singular issue is pretty straightforward to fix, and will
> result in a huge win, I've made a
> ticket:http://trac.sagemath.org/sage_trac/ticket/7351
>
> -- William
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