tustvold commented on code in PR #4343:
URL: https://github.com/apache/arrow-rs/pull/4343#discussion_r1214045538
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arrow-data/src/transform/mod.rs:
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@@ -53,7 +53,7 @@ struct _MutableArrayData<'a> {
pub null_count: usize,
pub len: usize,
- pub null_buffer: MutableBuffer,
+ pub null_buffer: Option<MutableBuffer>,
Review Comment:
This does add a branch on append, in practice appending to a null mask is so
branch heavy anyway, not to mention already involving a dyn dispatch, I
struggle to see how this could have an appreciable performance impact
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