Re: TI89 very slow !!!


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Re: TI89 very slow !!!



Christian Meland wrote:
>
> Kasper Vibe Grevsen <"remove"kaspervg@post6.tele.dk> wrote in article
> <6v3975$53mi$3@news-inn.inet.tele.dk>...
> > ...
> > >fct1(10000) takes 85 sec to display 10001
> > ...
> > TI-86 rom 1.2 on the main screen:
> > For(x,1,10000:End:x took 45 secs. - try and let's compare
> >
> >
> > >
> > >fct2(10000) takes 140 sec to display 10000.
> > For(x,1,10000:x->t:End:t took 195 secs.
> >
> >  Even
> > >the HP48 with its 4 bits saturn processor goes faster !
> > >
> >
> > Examples, please!
>
> I don't know how to read ti-programs, but executing a loop with a counter
> 10000 times takes less than 28 seconds on my hp 48 gx
>
> ( << 1 10000 FOR i NEXT >>)

Yes

<< 1 10000 FOR i NEXT >>

28 sec for a 4 bits 6 MHz processor

and

:Prgm
:Local i
:For i,1,10000
:EndFor
:EndPrgm

67 sec for a 32 bits 10 MHz processor

My opinion is TI should improve their ROM. The TI89 should take less than 1 sec
to do this loop if the object 'binary integer' would exist on the TI89 and it
should be !!! 'binary integer' is the basic element of any program and it would
improve the speed of programs by a factor a 100 !


> > >And about memory:
> > >seq(t,t,1,1000) takes 8 sec to display the list of {1 2 ... 1000}
> >
> > 20s
> >
>
> HP 48: << 1 1000 FOR i i NEXT 1000 ->LIST >> take 3,9 sec.

No comment. Specially when you know that lists on the HP48GX are much more
powerful than the list of the TI89 !!!!

I bought a TI89, but I though it was well programmed. Today, I don't know if it
was the right choice...

> Christian
>
> --
> Christian Meland
> Research Scientist, PFI
> N-7034 Trondheim, Norway
> Phone +4773550976, at home +47 73922526

--
[ Deniau Laurent -- Numerical Analysis and Signal Processing ]
[    CERN -- The European Laboratory for Particle Physics    ]
[ Laurent.Deniau@cern.ch -- http://wwwinfo.cern.ch/~ldeniau  ]
[      -- One becomes old when dreams become regrets --      ]


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