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PERF: groupsort_indexer contiguity #42031

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Merged
merged 6 commits into from
Jul 28, 2021
Merged

PERF: groupsort_indexer contiguity #42031

merged 6 commits into from
Jul 28, 2021

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mzeitlin11
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Some low-hanging fruit

In [1]: import numpy as np
   ...: import pandas._libs.algos as libalgos
   ...:
   ...: np.random.seed(0)
   ...: inds = np.random.randint(0, 100, 500000)
   ...: ngroups = inds.max() + 1

In [2]: %timeit libalgos.groupsort_indexer(inds, ngroups)

1.06 ms ± 11.3 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each) # this pr
1.2 ms ± 39.1 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each) # master

@mzeitlin11 mzeitlin11 added Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Performance Memory or execution speed performance labels Jun 15, 2021
@jreback jreback added this to the 1.4 milestone Jun 15, 2021
jbrockmendel
jbrockmendel approved these changes Jun 16, 2021
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LGTM (assuming the CI failures are unrelated)

jbrockmendel
jbrockmendel approved these changes Jul 26, 2021
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LGTM

@jreback jreback merged commit a9cb219 into pandas-dev:master Jul 28, 2021
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jreback commented Jul 28, 2021

thanks @mzeitlin11

@mzeitlin11 mzeitlin11 deleted the groupsort_indexer branch July 28, 2021 01:54
CGe0516 pushed a commit to CGe0516/pandas that referenced this pull request Jul 29, 2021
@mzeitlin11 @CGe0516
PERF: groupsort_indexer contiguity (pandas-dev#42031)
86c45f1
feefladder pushed a commit to feefladder/pandas that referenced this pull request Sep 7, 2021
@mzeitlin11 @feefladder
PERF: groupsort_indexer contiguity (pandas-dev#42031)
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Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Performance Memory or execution speed performance

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