Am 30.09.2022 um 16:31 schrieb Riccardo (Jack) Lucchetti: [I'm switching this to the devel list.] Yes, for your RBC script ("...minifunc...") I'm seeing a change of runtimes from 720 secs to about 140 seconds on a Win10-laptop here, so that's certainly very nice. However, consider a similar exercise in my protoype package (from 2020) which I'm attaching. That "hanslspeedjulia" package comes with an "examples" directory which has a RBC_Hansldriver.inp script. If you open that script and change the line "tryJulia = 1" to "tryJulia = 0", then it runs a hansl function which is also based on Federico's earlier RBC code. But with that thing I'm _not_ seeing a difference between gretl 2022b and the current snapshot. Obviously the scripts are not identical, but I don't have time right now to analyze where the difference is. Off-topic: This package of mine hasn't been published because it relies on an external program (Julia, of course). Some time ago we discussed that perhaps it might still be published because it provides the translation of (a subset of) hansl to Julia code. And the actual invocation of Julia would not be happening in the sample script and so "officially" a Julia installation would not be needed; instead the invocation of Julia would only be documented and described, and examples would be given. This never happened, however, partly because it feels a little bit like cheating. So the question right now is, should such a "trick publishing" of this package happen, anyway? thanks sven