Arrays in Rev (long)

[Troy Rollins]

On Jul 13, 2004, at 12:33 AM, Richard Gaskin wrote:

> Does 0.124ms per access have you tapping your foot with impatience? ;)

Generally, no. Obviously not. As you say, speed is relative, and Rev is 
undeniably fast.

>
> I wonder what accounts for the difference.  My PB has an L3 cache, 
> 768MB RAM, OS X 10.3.4.  Any other differences we might look at?

PB 17", 1GB RAM OSX 10.3.4 (Fairly busy machine right now. Probably a 
dozen+ apps running, a bunch o'stacks open in Rev.)

> It's interesting to see how close the times are for the object-based 
> properties and the variable-based arrays.  This would be jaw-dropping 
> in any other xTalk, as most others page objects from disk and you know 
> what that does to performance, but just another benefit of the 
> always-in-RAM way that Rev deals with stack files.
>
> And all the while, just one line away from being saved to disk if 
> needed.
>
> If the ~40% difference in execution speed is critical (here that 
> amounts to 0.0055ms per access), remember you can always store an 
> array into an object's custom props if needed:
>
>   put the customProperties of stack tMyStack into tMyArray
>   set the customProperties of stack tMyStack to tMyArray

Given that all the choices have some compromise, I still favor this one 
I think (stacks, and stack properties moved to vars when speed really 
matters). Mostly due to the improved versatility.

I do like the one line to save bit, as well.
--
Troy
RPSystems, Ltd.
http://www.rpsystems.net