[BioC] how long to calculate gcrma on 16 arrays?

[Dick Beyer]

I have 16 mgu74av2 arrays.  When I do rma, it takes 45 seconds.  When I do gcrma, it doesn't finish after 20 minutes.  How long should it take?

> ghrko.gcrma <- gcrma(ghrko.raw)
Loading required package: mgu74av2probe 
Loading required package: matchprobes 
background correction: gcrma 
normalization: quantiles 
PM/MM correction : pmonly 
expression values: medianpolish 
background correcting...                <- gets stuck here


I am running Windows 2000, R 1.7.1, biobase 1.3.29, affy 1.2.30, gcrma 0.4.0, 2.8GHz dual Xeon, with 4GB RAM.

Thanks for any help or suggestions,
Dick
*******************************************************************************
Richard P. Beyer, Ph.D.	University of Washington
Tel.:(206) 616 7378	Env. & Occ. Health Sci. , Box 354695
Fax: (206) 685 4696	4225 Roosevelt Way NE, # 100
			Seattle, WA 98105-6099