[ENH] Ten Percent Faster Morphic! (with conversion)
ned at bike-nomad.com
Tue Aug 6 18:02:50 UTC 2002
On Tuesday 06 August 2002 09:44 am, Henrik Gedenryd wrote:
> So I suggest that a much simpler solution/smaller change is to
> instead add a primitive for scanFor:, to which you pass the hash
> value to use
But wouldn't that force the hash to be generated/accessed? With my
optimizations, hash is skipped altogether; I'm just doing a linear
Depending on whether the (hash mod: size) operation is costly, it
might make sense to do this in the primitive as well.
Perhaps two methods:
Array>>identityScanFor:startingAt: (linear search from given start;
wrap at end)
Array>>identityScanFor:hash: (generate index first then do same as
> so you can use the same one also for regular
> dictionaries. It should be possible to refactor the code for the
> message lookup of the vm, in
> Interpreter>>#lookupMethodInDictionary: , into something like
> lookupKey: key startingAt: index .
well, that's a bit specialized, in that it stops at the first nil.
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