On Tue, Mar 5, 2013 at 6:26 AM, Rolf Huehne <[email protected]> wrote:
> On 02/28/2013 09:19 PM, Daniel Barich wrote:
> > Thanks - my pages work great with the new JSmol version. Incidentally, I
> > find that the following page, which has a large molecule view, runs much
> > smoother in Chrome than Firefox:
> >
> > http://biology.kenyon.edu/BMB/jmodel/index.htm
> >
> > Do others experience the same?
> >
> Daniel, your question got delayed somehow, so my answer comes a little
> late.
>
> It is the same on my system (OpenSuse 11.4, Firefox 16.0.2, Chromium 25.0).
>
> Generally I would not recommend setting 'spin' on by default with JSmol
> and protein structures in a large canvas because JSmol is about ten
> times slower than Jmol in most browsers in my experience. (At least it
> was several weeks ago.) With JSmol the speed is not only dependent from
> the CPU speed but also from the browser Javascript speed.
>
>
I agree completely about spin. That's one of the least worked-out aspects
of JSmol. Small molecules -- no problem; large molecules, more of a
problem.
It would be good to check this out again. I've done some pretty significant
optimizations recently. Surface creation, for example, is much much faster.
(small protein solvent-accessible surface in 1.5 sec.)
> Somewhat strange seems that spinning in Firefox is much slower (and
> stuttering) than free rotation with the mouse, which is quite fluent
> with your example protein containing only about 3500 atoms. Free
> rotation with the mouse is also even speedier in Chromium.
>
>
This something I can probably look at.. Since JavaScript does not have
multiple threading, I've played some pretty fancy tricks to get spinning at
all. Certainly room for optimization there, but it is a LOT of rendering.
> Regards,
> Rolf
> --
>
> Rolf Huehne
> Postdoc
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--
Robert M. Hanson
Larson-Anderson Professor of Chemistry
Chair, Chemistry Department
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr
If nature does not answer first what we want,
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