Re: Projects I may be willing to sponsor - FFI Array Sum versus native table results
- From: Mike Pall <mike-1412@xxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Thu, 11 Dec 2014 00:29:11 +0100
Joe Ellsworth wrote:
> In this instance it happened to prove that it
> probably is not worth the overhead of using the FFI array but if it
> had saved 20% then it could have a profound impact on total run
> time.
But when you use this in a real setting, you have to consider that
the GC needs to traverse Lua arrays, but not FFI arrays. Especially
with out-of-cache loads, that's a considerable cost you need to
factor into the whole comparison.
--Mike
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