On Mon, 9 Jan 2017, Marcin Błażejowski wrote: Up to a point, actually. My suspicion is that the small differences your script reveals are due to the fact that internally, gretl numbers are all doubles, even if marked as ints in function declarations. Libc string functions, instead, work byte by byte and are super optimised. But it's a wild guess; there could be some other reason tied to the inner working of our interpreter. ------------------------------------------------------- Riccardo (Jack) Lucchetti Dipartimento di Scienze Economiche e Sociali (DiSES) Università Politecnica delle Marche (formerly known as Università di Ancona) r.lucchetti(a)univpm.it http://www2.econ.univpm.it/servizi/hpp/lucchetti -------------------------------------------------------