pola-rs/polars py-0.16.14 on GitHub

🚀 Performance improvements

optimize string kernels, (elide redundant allocs) (#7602)
even faster polars module import (~15%) (#7584)
optimize str_replace for same length replacements ~2x (#7580)
reinstate fast module import and optimise DataFrame init by implementing dynamic singledispatch registration (#7559)
improve perf or str.replace_n and add n argument ~10x (#7575)
speedup replace_literal_all of single byte replacements ~15x. (#7565)
set sorted flags (#7558)
extend ultrafast constant-value frame init to temporal types (over 1,000x speedup) (#7527)

slightly more space-efficient table output (use ellipsis char, not three periods) (#7599)
implement decimal -> dtype cast (#7600)
use head on pyarrow datasets (#7570)
overwrite streaming chunk size (#7543)

remove index columns in pandas to_sql() (#7596)
add decimal chunk_lengths (#7589)
fix ooc sort. the fast path was invalid (#7588)
Fix regression throwing AmbiguousTimeError in groupby_dynamic (#7454)
activate dtype-duration for polars-ops (#7582)
distinct project whole schema if not a subset (#7581)
reinstate fast module import and optimise DataFrame init by implementing dynamic singledispatch registration (#7559)
sql window functions (#7458)
respect time zone in upsample (#7563)
fix rolling windows for windows that shrink from lhs (#7556)
remove pyarrow from construction and dispatch to rust (#7551)
fix negative indexing for head/tail (#7554)
Remove BatchedCsvReader from public API (#7546)
fix logical/list getitem (#7545)
pushdown key in merge sorted projection pd (#7542)
don't upcast column to string in 'is_in' operation (#7538)

Move more code out of internals (#7597)
add a performance hint about use of lru_cache to the apply docstrings (#7593)
Avoid pli in type hints (part 2) (#7587)
Avoid pli in type hints (part 1) (#7586)
Move core objects to top level (#7576)
Bump ruff (#7567)
Rename namespace Array -> List in docs (#7541)
Move fmt tests to test_fmt (#7555)
Rename sep arg to separator (#7533)
Minor Series cleanup (#7531)