tustvold commented on code in PR #3793:
URL: https://github.com/apache/arrow-rs/pull/3793#discussion_r1123435780
##########
arrow-array/src/array/fixed_size_binary_array.rs:
##########
@@ -141,8 +141,11 @@ impl FixedSizeBinaryArray {
let mut len = 0;
let mut size = None;
let mut byte = 0;
- let mut null_buf = MutableBuffer::from_len_zeroed(0);
+
+ let iter_size_hint = iter.size_hint().0;
+ let mut null_buf = MutableBuffer::from_len_zeroed((iter_size_hint + 7)
/ 8);
Review Comment:
Can we use bit_util::ceil here instead
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