Re: TIB: program speed
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Re: TIB: program speed
Jeremy Braun wrote:
>
> > Yes, when a calculator encounters an If statement with a False boolean,
> > it ignores the next command completely.
>
> Nope, it Can't (unless something else is true, noted below)! An if/then
> statement on 85/86/82/83 the next line after the if is then, so it has to
> check (92 is on same line, so its different)UNLESS-an if/then loop is
> tokenized as a single token. ie-the token for an if check is different for
> an if/then/else/end check.
>
> Just a thought,
> Jeremy Braun
>
> PS-don't know much about the tokens on calcs, anyone know what exactly is
> replaced, and if I'm right or wrong?
>
> Also, on of the reasons that Q/(C==2->R is slow is that the calc has to do a
> test, then a division, and then a memory transfer. And division is
> notoriously slow on computers...the if loop simply does a test and then the
> memory transfer, minus the division. :)
Wow! I'm sure if I had understood that, I would have learned a lot. :)
Okay...It sounds like, from your first paragraph, that you're talking
about If, THEN statements. I was thinking more along the lines of
If <logic statement>
<do a command>
Next, what is a token? What is tokenization? What is happening? Why is
it important?
In my original example it was Q+(C=2->Q, not division. (Note the
single =. I'm using an 83, so I don't need the ==) But I don't think
that is important - it COULD have been a division. So, if I'm getting
this right, you're saying that it is FASTER to do
:If C=2
:Q+1->Q (or Q/5->Q or whatever)
and it is SLOWER to do
:Q+(C=2->Q
Do I got it right?
Jody Snider
jody1@alaska.net
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