mapleFU commented on code in PR #41189:
URL: https://github.com/apache/arrow/pull/41189#discussion_r1565888338
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cpp/src/arrow/array/builder_nested.cc:
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@@ -213,13 +213,13 @@ Status FixedSizeListBuilder::AppendValues(int64_t length,
const uint8_t* valid_b
Status FixedSizeListBuilder::AppendNull() {
RETURN_NOT_OK(Reserve(1));
UnsafeAppendToBitmap(false);
- return value_builder_->AppendNulls(list_size_);
+ return value_builder_->AppendEmptyValues(list_size_);
Review Comment:
So might be a performance for deep nested thing like
`FixLengthArray<struct<str, str, str>, ...>`?
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