Please allow me further question.

[unearther]

I would like to reduce the time of imputation as my dataset is more than n=100,000 and it takes very very long (around 20 minutes) to do first iteration.
I don't know what this MCMC estimation settings, so so far I have been using default setting.

Is there a good way to reduce imputation time by changing setting?

[ChrisCharlton]

Unfortunately Realcom does not have any estimation settings that would speed up for time taken for a single iteration.