DM42 vs hp49gp (performance-wise)

[rprosperi]

What YT video???

A 15C cannot possibly compete with a DM41X or DM42, assuming the same algorithm and roughly the same program, unless it's a 15C Limited Edition model from 2011, which are rare and expensive (sold as collector's items), and even then they are somewhat buggy with poorer keyboards than your original 15C (even with all the miles it has).

Similar programs on a DM41X are definitely slower than on a DM42, but still a factor of 10's faster than an original 41C.

Comparing a DM42 program with a 49g+ is much harder as the programs are naturally much different (RPN vs RPL) so you would have to create some kind of benchmark program in both languages, which use the kinds of operations needed in your target program (e.g. I'd assume with lots of floating point path, Trig, Logs, Roots, etc.).