OpenEuphoria

Re: Efficiency

• Posted by jbrown105 at speedymail.org Oct 25, 2002
• 550 views

On  0, Don Phillips <EuNexus at yahoo.com> wrote:
> 
> In my off time, I sometimes like to browze a lot of the programs
> in the contributions and vault pages.  Lots of good programs
> and knowledge floating around out there.
> 
> Time and time again, I keep seeing patterns in some of the code.
> In particular, this little snip (or variations of it) crop up
> quite consistantly:
> 
> [poking a string into memory]
>      poke( ADDR, STR )           -- poke the string
>      poke( ADDR+length(STR), 0 ) -- poke the null terminator
> 
> To me, this looks like it would be slower than the following:
> 
> [poking a string into memory]
>      poke( ADDR, STR & 0 )       -- poke the string
> or
>      poke( ADDR, STR & {0} )     -- poke the string
> 
> Is there something about concatenating sequences in Euphoria
> that would slow these two down sufficiently that the first
> example is preferable?
> 
> Don
> 

Yes. concatenating is slow, due to pointer references.
First example needs less than the second, for reasons I am not
aware of (I dont own the source, so I cant say why, but I suspect its
related
to pointers).

jbrown


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