Please use Chimera's Help / Report a Bug dialog to file this as a bug, and, if possible, give the PDB id of the 80S ribosome you are trying to view.  That will tell us about your computer and the size of the structure you're trying to view, and that will enable us to give a better answer.

So, my guess it that you are trying view a structure that is too big for your computer to handle quickly.  So the solution would be to increase the physical memory.  You may also need a graphics card with more memory.  Another possibility is that you are reading in the structure using the mmCIF reader -- in Chimera, the mmCIF reader is slow and the solution is to use the PDB format version.  Our Chimera successor, ChimeraX, reads mmCIF files very quickly and can handle large files with ease.  Unfortunately, ChimeraX is not yet available.

   HTH,

   Greg

On 03/17/2016 03:15 AM, benoit.zuber@ana.unibe.ch wrote:
Hello 
Opening a model of the 80S ribosome takes about 30 minutes on my computer (chimera version 1.10.2 build 40686). Is it normal? Is there any way to speed up this step (for example, can the task be parallelized)? 
Thanks in advance
Ben
-- 
Prof. Benoît Zuber
Institute of Anatomy
University of Bern
Baltzerstrasse 2
Postfach 922
3000 Bern 9
Switzerland
+41 31 631 84 40


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