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Xavier LacrozeWes McKinney
e4bf4297585
Xavier Lacroze authored and Wes McKinney committed 01854921f6e
ARROW-7367: [Python] Use np.full instead of np.array.repeat in ParquetDatasetPiece

For small tables (len < 100) execution time is slightly degraded (~ x1.4 at len = 10), for large ones performance gain is huge (~ x0.04 at len = 100_000)

Closes #5999 from 0x0L/patch-1 and squashes the following commits:

1a9297dca <Xavier Lacroze> use np.full instead of np.array().repeat()

Authored-by: Xavier Lacroze <3621629+0x0L@users.noreply.github.com>
Signed-off-by: Wes McKinney <wesm+git@apache.org>