On Sunday, 10 January 2016 at 03:23:14 UTC, Ilya wrote:
I will add significantly faster pairwise summation based on SIMD instructions into the future std.las. --Ilya

Wow! A lot of overhead in the debug build. I checked the computed values are the same. This is on my laptop corei5.

dub -b release-nobounds --force
parallel time msec:448
non_parallel msec:767

dub -b debug --force
parallel time msec:2465
non_parallel msec:4962

on my corei7 desktop, the release-no bounds
parallel time msec:161
non_parallel msec:571




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