Most analyses have reached convergence within 30 iterations. A tentative guideline is:

length of analysis in minutes = (number of persons)*(length of test)/1,000,000

 

An analysis of 7000 persons on 2700 items using a 2.5GHz PC with 2GB RAM required 10 minutes.

 

For a faster analysis,

at least 2GB of RAM memory

specify PRCOMP=NO if you don't want to produce ICORFILE=, PCORFILE=, Table 23 or Table 24

specify DISTR=NO if you don't want distractor/option sub-tables

put the input files and the work files on different disk drives, see Edit Initial Settings.