Help using use_tarb in Dynare Unstable (2015-09-30)

I am trying to estimate the Smets and Wouters (2007) model using the TaRB-MH algorithm, in Dynare Unstable (2015-09-30).
The estimation command is called as:

estimation(mode_compute=1,use_tarb,order=1,datafile=usmodel_data,mh_replic=5000, mh_nblocks=2, mh_jscale=0.3);

The issue is that the MH algorithm is runs VERY slowly. Did I do something wrong? Or is the TaRB-MH algorithm so computationally expensive?

Thank you

Yes, it is really computationally expensive.

thank you