sio/parquetio: use vector.NewUnionOfOne for nullable unions - #7277
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This noticeably improves vectorBuilder.buildNullableUnion performance on inputs producing many vectors that are either all null or all non-null.
mccanne
approved these changes
Sep 3, 2026
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This noticeably improves vectorBuilder.buildNullableUnion performance on inputs producing many vectors that are either all null or all non-null.