rust-polars-v0.20.0

版本发布时间: 2022-03-14 23:54:28

pola-rs/polars最新发布版本:py-1.8.2(2024-09-25 04:10:38)

New rust polars release! :rocket:

This release of 286 commits is here thanks to the contributions of: (in no specific order):

did I forget your contribution, please ping me, I do this manually :see_no_evil:

Most notable changes are:

Made representation of groups tuples more cache friendly #2431
Remove Seek requirement of readers
Add groupby_rolling as new entrance to expression API.
Improve CSV parsers stability and performance on several occasions
Horizontal aggregations are parallelized #2454
Reduce pivot code bloat and improve performance #2458
Struct data type added.
Extend methods that allow modification of the same memory if Arc::ref_count == 1
Avro readers and writers.
Improved rules of window expressions.
Support for us time unit.
Parquet use statistics in query optimizations.
Optimize projections in lazy computations. (Mostly useful when you deal with a large number of columns e.g. millions).
Improve performance and flexibility of melt operation @2799
new expressions
- str.split
- str.split_inclusive
- arr.join
- unique_stable
- str.split_exact
- count expression that does not require column names
- arr.arg_min
- arr.arg_max
- arr.diff
- arr.shift

See the 0.10.0 release for all upstream improvements.