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On Sep 6, 2014, at 10:17 AM, Maurik Holtrop <[log in to unmask]> wrote:

> Hello Pelle,
> 
> I just rebuild a fresh install of SLIC from scratch, using the Qt libraries. 
> 
> The startup time seems to depend hugely on the geometry that you load. I seem to recall this has to do with loading the GDML and some of the verifications that go on when you load it. If you load the geometry: HPS-Proposal2014-v8-6pt6, which appears to not have all the flanges for the ECAL, then the startup time into interactive SLIC is about 20 seconds.
> On the other hand, the geometry: HPS-Proposal2014-v7-2pt2, takes forever to load.
> 

Ok. At this time Iím only working on the tracking geometry so I donít have any of that in my geometry.

Also, Jeremy fired my geometry into interactive in basically no time on a linux machine so I think there is still something strange going on. Do you know that you get the same ~20s on e.g. a linux machine? I will try to make sure that is the case anyway.

/Pelle


> There may be ways to optimize the ECAL flange geometry in a way that it loads quicker when loading it from GDML. I know that the identical geometry loads in seconds with GEMC, where the geometry is rendered directly from instructions from a text file. 
> 
> I am a bit worried if we are leaving out carefully constructed geometry from version 8 because it loads slowly. This geometry is correct and was carefully constructed from the drawing by Holly, and I made some minor modifications to turn it into valid GDML. Perhaps one of our GEANT4 experts can comment on why the GDML loads so slowly?
> 
> Best,
> 	Maurik
> 
> 
> 
> 
> On Sep 5, 2014, at 9:04 PM, Hansson Adrian, Per Ola <[log in to unmask]> wrote:
> 
>> Hi,
>> 
>> anyone successfully running slic on mac os x? My version kind of runs but takes for ever to start and looks like itís really hanging when I try to get to the g4 prompt at startup. 
>> 
>> I run OS X 10.9.2. 
>> 
>> If you have a successful version running, what version and any special settings?
>> 
>> /Pelle
>> 
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