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Re:Apache Arrow 3.0 by MrPowers on Wednesday February 03, 2021 @03:41PM (#26018818)
CSV is a file format and Arrow is an in memory data format.

The CSV vs Parquet comparison makes more sense. Conflating Arrow / Parquet is a pet peeve of Wes: https://news.ycombinator.com/item?id=23970586

Re:Apache Arrow 3.0 by nolta on Wednesday February 03, 2021 @04:35PM (#26019457)
To be fair, arrow absorbed parquet-cpp, so a little confusion is to be expected.