[REBOL] Re: To-pair vs as-pair
From: rebol-list2:seznam:cz at: 3-Jan-2003 11:54
Hello Anton,
Thursday, January 2, 2003, 1:24:52 AM, you wrote:
A> Yes, as-pair is quite useful.
A> Keep in mind that if you use these
A> functions in a tight loop that draws
A> some graphics, for example, you can
A> get some speed by gutting the functions.
A> Let's look at the sources:
>>> ?? as-pair
A> as-pair: func [
A> "Combine X and Y values into a pair."
A> x [number!] y [number!]
A> ][
A> to-pair reduce [to-integer x to-integer y]
A> ]
A> You can see that as-pair makes three mezzanine function calls.
A> This will slow you down in a tight loop, so instead,
A> you could just do everything yourself:
A> to pair! reduce [to integer! x to integer! y]
A> That will be much faster.
When you are talking about that, I wonder why RT uses the slower
to-pair and to-integer in such a functions...
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