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Pairwise reductions? #21

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simonster opened this issue Oct 29, 2013 · 2 comments
Closed

Pairwise reductions? #21

simonster opened this issue Oct 29, 2013 · 2 comments

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@simonster
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In Base, the sum function divides the array to be processed in half recursively and sums those halves, and then combines the sums. Per JuliaLang/julia#4039, this greatly increases accuracy with negligible performance cost. Assuming this can be generalized to arbitrary reductions across arbitrary dimensions without a massive performance hit, it would be nice to implement in NumericExtensions as well.
@lindahua
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I am working on a major revision of the package: see #18.

Will take this idea into account in the next major release.

@lindahua
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Implemented in latest version v0.3.

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@simonster @lindahua