emilk commented on code in PR #10759:
URL: https://github.com/apache/arrow-rs/pull/10759#discussion_r3823959681
##########
arrow-buffer/src/builder/null.rs:
##########
@@ -244,19 +241,17 @@ impl NullBufferBuilder {
Some(self.bitmap_builder.as_ref()?.as_slice())
}
- fn materialize_if_needed(&mut self) {
- if self.bitmap_builder.is_none() {
- self.materialize()
- }
+ fn materialize_if_needed(&mut self) -> &mut BooleanBufferBuilder {
+ let (len, capacity) = (self.len, self.capacity);
+ self.bitmap_builder
+ .get_or_insert_with(|| Self::materialize(len, capacity))
}
Review Comment:
Yeah - the hot path should be _slightly_ faster now, since the `unwrap`s are
gone!
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