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[hail] Fix EXTREME performance regression in column scans. #7771

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merged 1 commit into from Dec 20, 2019

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tpoterba commented Dec 20, 2019

They were quadratic. Bad bad bad bad bad.

Benchmark now takes ~7s, compared to roughly the amount of time it
would take for my laptop to naturally sublimate.

They were quadratic. Bad bad bad bad bad.

Benchmark now takes ~7s, compared to roughly the amount of time it
would take for my laptop to naturally sublimate.
@danking danking merged commit c8417a5 into hail-is:master Dec 20, 2019
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akotlar commented Dec 20, 2019

Tim for the record I think your joke is really funny

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tpoterba commented Dec 20, 2019

hardship brings out the best in us

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