On Thu, Jan 9, 2014 at 6:35 AM, Colin Putney <colin at wiresong.com> wrote:

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> On Thu, Jan 9, 2014 at 2:01 AM, Levente Uzonyi <leves at elte.hu> wrote:
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>
>> Also, I prefer the lazy #or: over #|, because it's faster.
>
>
> Normally, yes, but in this case, I think #| is actually faster. Consider
> the two versions (without the bug):
>
> a)  (lastObject == object) | (object == 0)
>
> b) (lastObject == object) or: [object == 0]
>
> Lazy evaluation doesn't help here, because the first comparison will
> almost never be true. On the other hand, #== is very fast, because it's a
> bytecode, whereas #or: involves an extra message send and creating a stack
> frame to execute the block.
>

It's the other way around.  #or: is inlined into jump bytecodes. #| is a
real send.


>
> Colin
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>


-- 
best,
Eliot
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