[oopic] Re: Optimizing code

--- In oopic@yahoogroups.com, "red71956" <kdwyer@...> wrote:
>
> I uploaded a (not-yet-finished) file - OttoExplorer - that uses 79
> bytes of RAM, close to the limit of 86. I made very liberal use of
> cut 'n paste so you may find many sections familiar. I tried to keep it
> well-commented.
> I used: an LCD, sonar, IR, pan/tilt servos, 2 DC motors, and lots of
> Constants.
> My understanding is that using constants will store values in EEPROM,
> freeing up limited system resources. I also know that using VCs
> (virtual circuits) can help speed program execution.
>
> Is there a trick I am missing, or misusing? I'd luv some advice on how
> to optimize the code (esp. with VCs) so I can get the most out of my
> ooPIC. I tend to write sloppy code, so tightening up the code and
> making best use of resources is important. Execution speed is not as
> important to me as maximizing use of limited ooPIC resources.
>
> The code is far from finished, but it is a good start, and hopefully
> easy to follow. It is for a B2.2+ ooPIC using V6 compiler.
>

Your resource limitation is object memory. Adding VS's won't
necessarily improve that. In fact, the oBus or oWire objects will
probably increase the usage.

Sub explore() could probably be replaced by a VC that triggers an
event and the event code would trigger avoid() function. But all that
would do is collapse the explore() function and eliminate the loop in
main().

Using the named constants doesn't result in any less object memory and
may not really change the code space requirements either. Write a
simple program like:

dim a as new oByte
const SixtyFour = 64

sub main()
a = 64
a = SixtyFour
end sub

Then look at the emitted code and see if the two are different. I'm
not on a Windows box at the moment so I can't really test this. I
doubt they are different. YEARS ago, with interpreted Basic, named
constants were faster that numeric constants; depending on the
interpreter, of course.

You might try using Byte instead of oByte and save a little object memory.

Richard

------------------------------------

Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/oopic/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/oopic/join
(Yahoo! ID required)

<*> To change settings via email:
mailto:oopic-digest@yahoogroups.com
mailto:oopic-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
oopic-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/