Silence criterion related warnings

Author: pepijnve

arrow-array/benches/record_batch.rs

@@ -17,8 +17,9 @@
 
 use arrow_array::{ArrayRef, Int64Array, RecordBatch, RecordBatchOptions};
 use arrow_schema::{DataType, Field, Schema, SchemaRef};
-use criterion::*;
+use criterion::{BenchmarkId, Criterion, criterion_group, criterion_main};
 use num_integer::Integer;
+use std::hint::black_box;
 use std::sync::Arc;
 
 fn make_record_batch(column_count: usize, row_count: usize) -> RecordBatch {

arrow-array/benches/view_types.rs

@@ -16,7 +16,8 @@
 // under the License.
 
 use arrow_array::StringViewArray;
-use criterion::*;
+use criterion::{Criterion, criterion_group, criterion_main};
+use std::hint::black_box;
 
 fn gen_view_array(size: usize) -> StringViewArray {
     StringViewArray::from_iter((0..size).map(|v| match v % 3 {

parquet/benches/metadata.rs

@@ -15,6 +15,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
+use std::hint::black_box;
 use std::sync::Arc;
 
 use parquet::basic::{Encoding, PageType, Type as PhysicalType};
@@ -32,7 +33,7 @@ use rand::Rng;
 
 use arrow::util::test_util::seedable_rng;
 use bytes::Bytes;
-use criterion::*;
+use criterion::{Criterion, criterion_group, criterion_main};
 use parquet::file::reader::SerializedFileReader;
 use parquet::file::serialized_reader::ReadOptionsBuilder;