[Jmol-developers] [ jmol-Bugs-1016913 ] Performance issue

[SourceForge.net <no...@so...>]

Bugs item #1016913, was opened at 2004-08-26 16:29
Message generated for change (Comment added) made by nicove
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=379133&aid=1016913&group_id=23629

Category: None
Group: HEAD
Status: Open
Resolution: None
Priority: 5
Submitted By: Nico (nicove)
Assigned to: Miguel (migueljmol)
Summary: Performance issue

Initial Comment:
With the big file attached, I have performance problems :
- visualisation with 100% van der waals,
- zoom in closely,
- from then on, if I click and move the mouse JMol is 
stuck during redraw (several redraws are done one after 
an other, each one taking several seconds)

----------------------------------------------------------------------

>Comment By: Nico (nicove)
Date: 2004-08-26 21:08

Message:
Logged In: YES 
user_id=1096197

To answer you Q : I tried to promote Jmol among people 
participating in the Folding@Home project (the Tinker format I 
asked about). One of them told me, it found it really slow with 
a lot of atoms : at first I didn't understand why so I tried 
different combinations and got those performance issues 
when zooming alot.

----------------------------------------------------------------------

Comment By: Miguel (migueljmol)
Date: 2004-08-26 20:53

Message:
Logged In: YES 
user_id=1050060

Jmol does not do any queuing of mouse events ... that is all
handled by the underlying system. 

And the the underlying environment (windowing system + java
implementation) *should* collapse multiple repaint events
into a single event. If that is not happening then it is a
problem. 

I cannot think of any way that Jmol could collapse these
events. I will keep thinking about it, but I am not
optimistic that we can solve the problem. 

Q: Why do you want to zoom in so close? 


Miguel


----------------------------------------------------------------------

Comment By: Nico (nicove)
Date: 2004-08-26 20:43

Message:
Logged In: YES 
user_id=1096197

Ok, I can understand that the drawing can be very slow in 
some conditions (more 50 or 100 times slower in my case ;) ).

But, there is an other issue : it seems that the mouse 
movements are stacked, so if you move the mouse for several 
seconds and then release it, Jmol redraws several times 
(about 5 to 10 seconds for each redraw) : redraws can last 
several minutes in total.

Would it be possible to redraw only the last position ? It 
would accelerate a lot.
If not, don't worry about it.

Thanks for the answer

----------------------------------------------------------------------

Comment By: Miguel (migueljmol)
Date: 2004-08-26 19:45

Message:
Logged In: YES 
user_id=1050060

When you zoom in closely Jmol always has performance problems. 

If the diameter of a sphere is >128 pixels then the time
required to render the sphere goes up by a *lot* ... 25
times slower?

This will be very low priority for me to fix ... don't zoom
in so close :-)

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=379133&aid=1016913&group_id=23629