PERF: Some faster date/time string formatting#46759

Merged

jreback merged 40 commits intopandas-dev:mainfrom

smarie:feature/44764_strftime_perf_datetimes

Jul 1, 2022

Commits on Apr 12, 2022

Performance improvement in :class:`BusinessHour`, ``repr`` is now 4 times faster ! Related to #44764
Sylvain MARIE
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For the record: switching the repr in TimeDelta to old-style formatting
Sylvain MARIE
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added comment
Sylvain MARIE
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Minor: comment on speed
Sylvain MARIE
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added two comments for maintenance, about speed
Sylvain MARIE
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Performance improvement in :class:`DatetimeArray` and :class:`DatetimeIndex`: string formatting is now up to 80% faster (as fast as default) when one of the default strftime formats ``"%Y-%m-%d %H:…
Sylvain MARIE
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A few comments related to time formatting
Sylvain MARIE
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Performance improvement in :meth:`Series.to_excel` and :meth:`DataFrame.to_excel` (:class:`ExcelFormatter`): processing dates can be up to 4% faster. (related to :issue:`44764`)
Sylvain MARIE
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Added maintenance comments
Sylvain MARIE
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Performance improvement in `Series.to_sql` and `DataFrame.to_sql` (`SQLiteTable`): processing time arrays can be up to 65% faster ! (related to #44764)
Sylvain MARIE
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Merge branch 'main' of https://github.com/pandas-dev/pandas into feature/44764_strftime_perf_datetimes
Sylvain MARIE
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Commits on Apr 13, 2022

Revert "For the record: switching the repr in TimeDelta to old-style formatting"
Sylvain MARIE
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Updated what's new wrt code review
Sylvain MARIE
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Fixed what's new error
Sylvain MARIE
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Simplified sqlite adapter for time to handle both with and without timezone. Made it faster using f-string
Sylvain MARIE
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Fixed test
Sylvain MARIE
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Update pandas/_libs/tslibs/offsets.pyx
smarie
authored

Commits on May 12, 2022

Fixed Flake8 warning
Sylvain MARIE
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Added ASVs for strftime related perf
Sylvain MARIE
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Removed all other offsets from the ASV as they are not relevant
Sylvain MARIE
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black and isort
Sylvain MARIE
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Commits on May 13, 2022

Added default format for dates
Sylvain MARIE
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FixedImproved ASVs
Sylvain MARIE
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Merge branch 'main' of https://github.com/pandas-dev/pandas into feature/44764_strftime_perf_datetimes
Sylvain MARIE
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Commits on May 15, 2022

Code review: removed __main__ in asv bench
Sylvain MARIE
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code review: whatsnew
Sylvain MARIE
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Code review: added asserts to ensure basic_format and basic_format_day are exclusive
Sylvain MARIE
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Code review: inline comment style
Sylvain MARIE
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Attempt to improve SQL ASV (not tested)
Sylvain MARIE
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Fixed SQL ASV Bench.
Sylvain MARIE
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Commits on May 16, 2022

Black
Sylvain MARIE
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Commits on May 30, 2022

As per code review: moved assert outside of for loop
Sylvain MARIE
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Commits on Jun 7, 2022

Merge branch 'main' of https://github.com/pandas-dev/pandas into feature/44764_strftime_perf_datetimes
Sylvain MARIE
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As per code review: removed 2 useless variables and edited a comment
Sylvain MARIE
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Fixed wrong merge
Sylvain MARIE
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Commits on Jun 16, 2022

Commits on Jun 20, 2022

Merge branch 'main' of https://github.com/pandas-dev/pandas into feature/44764_strftime_perf_datetimes
Sylvain MARIE
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Removed useless line
Sylvain MARIE
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Commits on Jul 1, 2022

Merge branch 'main' of https://github.com/pandas-dev/pandas into feature/44764_strftime_perf_datetimes
Sylvain MARIE
committed