https://github.com/apache/datafusion-python/blob/79c22d6d6c0809e7e93a0a23249baa516dbd8d6f/src/dataframe.rs#L494 The compression algorithm is [LZO](https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Oberhumer), not to be confused with LZ4.
datafusion-python/src/dataframe.rs
Line 494 in 79c22d6
The compression algorithm is LZO, not to be confused with LZ4.