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bug in groupby when key space exceeds int64 bounds #9380

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Merged
merged 1 commit into from
Jan 31, 2015
Merged

bug in groupby when key space exceeds int64 bounds #9380

merged 1 commit into from
Jan 31, 2015

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behzadnouri
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closes #9096

also improves performance when there is int64 overflow; complete groupby benchmarks here.

-------------------------------------------------------------------------------
Test name                                    | head[ms] | base[ms] |  ratio   |
-------------------------------------------------------------------------------
groupby_int64_overflow                       | 637.6967 | 3021.1190 |   0.2111 |
-------------------------------------------------------------------------------

Ratio < 1.0 means the target commit is faster then the baseline.
Seed used: 1234

Target [d6e3cb7] : bug in groupby when key space exceeds int64 bounds
Base   [391f46a] : BUG: allow for empty SparseSeries SparsePanel constructors (GH9272)

@jreback jreback added this to the 0.16.0 milestone Jan 31, 2015
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jreback commented Jan 31, 2015

@behzadnouri this looks gr8! thanks

jreback added a commit that referenced this pull request Jan 31, 2015
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Merge pull request #9380 from behzadnouri/i8grby
9f439f0 
bug in groupby when key space exceeds int64 bounds
@jreback jreback merged commit 9f439f0 into pandas-dev:master Jan 31, 2015
@jreback jreback mentioned this pull request Jan 31, 2015
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@selasley selasley mentioned this pull request Feb 1, 2015
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@behzadnouri behzadnouri deleted the i8grby branch February 7, 2015 13:07
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Successfully merging this pull request may close these issues.

Groupby "negative dimensions are not allowed" error and bad key behaviour when there are NaNs values.
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