HP-67 internal function timings - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: HP-67 internal function timings (/thread-238881.html) HP-67 internal function timings - Dieter - 02-10-2013 I admit I am amazed at the speed of the 34s Matrix functions - even a 10x10 random matrix is inverted in fractions of a second (approx. 0,7×n3 ms on my hardware). That's roughly as fast as some transcendental functions on earlier HPs like the 67/97. I remember a table with the execution times of most 67/97 functions, given in milliseconds, somewhere in a HP related magazine or journal. I am sure I must have stored it somewhere on some harddrive, but I cannot seem to find it. Maybe someone can help and tell me where to find this info?! Dieter Re: HP-67 internal function timings - Jake Schwartz - 02-10-2013 Quote:I remember a table with the execution times of most 67/97 functions, given in milliseconds, somewhere in a HP related magazine or journal. I am sure I must have stored it somewhere on some harddrive, but I cannot seem to find it. Maybe someone can help and tell me where to find this info?! Hi, One of these appeared in PPC's "Better Programming On The HP67/97" publication, which was sent to members roughly in June of 1978, around the time of Volume 5, Number 5 of the PPC Journal. The table appears in pages 27-29. Jake Re: HP-67 internal function timings - Paul Dale - 02-10-2013 Quote:I admit I am amazed at the speed of the 34s Matrix functions - even a 10x10 random matrix is inverted in fractions of a second (approx. 0,7×n3 ms on my hardware). That's roughly as fast as some transcendental functions on earlier HPs like the 67/97. The surprising thing is I'm not using a particularly efficient algorithm for matrix inversion. A Doolittle LU decomposition with partial pivoting followed by solving lots of equations. - Pauli Re: HP-67 internal function timings - Dieter - 02-11-2013 Ah, thank you - now I know what to look for. I think I have a PDF of this. It must be somewhere deep down in some sub-sub-sub-folder... :-) Dieter