Dear All,
I have recently looked at posterior MCMC things and see that since dynare 4.2. ReshapeMatFiles is still alive for posterior irfs, while for all other posterior analysis reshape is no longer done and pm3 is used to manage the raw files saved during posterior sampling.
ReshapeMatFiles in posteriorIRF is still a big bottleneck for large models (for my last metropolis with QUEST it took 5.5 hrs to get the reshaped files, while the posterior sampling per se was much more rapid!).
If reshape is needed for posterior irfs, I think there are ways to make it quicker. I have yesterday tried an option which reduced the 5.5 hrs to 1hr20m. On the other hand, could we envisage the use of pm3 also for irfs and skip the use of Reshape as a whole?
best Marco