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MINOR: [C++] use std::move to avoid unnecessary copies #49342

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MINOR: [C++] use std::move to avoid unnecessary copies #49342

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2 changes: 1 addition & 1 deletion cpp/src/parquet/arrow/reader.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -976,7 +976,7 @@ Status GetReader(const SchemaField& field, const std::shared_ptr<Field>& arrow_f
if (!schema_child_type.Equals(reader_child_type)) {
child_field = child_field->WithType(child_reader->field()->type());
}
child_fields.push_back(child_field);
child_fields.push_back(std::move(child_field));
child_readers.emplace_back(std::move(child_reader));
}
if (child_fields.empty()) {
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6 changes: 3 additions & 3 deletions cpp/src/parquet/metadata.cc
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Expand Up @@ -177,9 +177,9 @@ std::shared_ptr<KeyValueMetadata> FromThriftKeyValueMetadata(const Metadata& sou
std::vector<std::string> values;
keys.reserve(source.key_value_metadata.size());
values.reserve(source.key_value_metadata.size());
for (const auto& it : source.key_value_metadata) {
keys.push_back(it.key);
values.push_back(it.value);
for (auto& it : source.key_value_metadata) {
keys.push_back(std::move(it.key));
values.push_back(std::move(it.value));
}
metadata = std::make_shared<KeyValueMetadata>(std::move(keys), std::move(values));
}
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