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Remove symmetries in the subset relation #78

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Merged
merged 1 commit into from
Sep 21, 2018

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lqd
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@lqd lqd commented Sep 21, 2018

On the clap dataset, there are:

  • Naive variant: subset (7 531 526) symmetries: 794 833
    Removing the symmetries results: from 36.7s to 33.2s (non-scientific benchmarks, best time)

  • DatafrogOpt variant: subset (2 714 121) symmetries: 481 294
    Removing the symmetries results: from 5.89s to 5.02s (non-scientific benchmarks, best time)

This could be considered as fixing #62.

r? @nikomatsakis

On the clap dataset, there are:
- Naive variant: subset (7531526) symmetries: 794833
Removing the symmetries results: from 36.7s to 33.2s (non-scientific benchmarks, best time)

- DatafrogOpt variant: subset (2714121) symmetries: 481294
Removing the symmetries results: from 5.89s to 5.02s (non-scientific benchmarks, best time)
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Hmm, hacky, but ... ok I guess.

@nikomatsakis nikomatsakis merged commit 714a052 into rust-lang:master Sep 21, 2018
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lqd commented Sep 24, 2018

For the record, my preferred 3rd way of doing this would be to add methods with filter_map capability to datafrog's map, join, antijoin, and treefrog joins.

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