diff --git a/arrow-cast/Cargo.toml b/arrow-cast/Cargo.toml
index a62e25eb9a57..4046f5226094 100644
--- a/arrow-cast/Cargo.toml
+++ b/arrow-cast/Cargo.toml
@@ -77,7 +77,3 @@ harness = false
 [[bench]]
 name = "parse_decimal"
 harness = false
-
-[[bench]]
-name = "cast_decimal"
-harness = false
diff --git a/arrow-cast/benches/cast_decimal.rs b/arrow-cast/benches/cast_decimal.rs
deleted file mode 100644
index cc85fc171137..000000000000
--- a/arrow-cast/benches/cast_decimal.rs
+++ /dev/null
@@ -1,46 +0,0 @@
-// Licensed to the Apache Software Foundation (ASF) under one
-// or more contributor license agreements.  See the NOTICE file
-// distributed with this work for additional information
-// regarding copyright ownership.  The ASF licenses this file
-// to you under the Apache License, Version 2.0 (the
-// "License"); you may not use this file except in compliance
-// with the License.  You may obtain a copy of the License at
-//
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing,
-// software distributed under the License is distributed on an
-// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-// KIND, either express or implied.  See the License for the
-// specific language governing permissions and limitations
-// under the License.
-
-use arrow_array::{ArrayRef, Decimal128Array};
-use arrow_cast::{cast_with_options, CastOptions};
-use arrow_schema::DataType;
-use criterion::*;
-use std::sync::Arc;
-
-fn criterion_benchmark(c: &mut Criterion) {
-    let decimals: ArrayRef = Arc::new(
-        Decimal128Array::from(vec![
-            0,
-            1234,
-            -1234,
-            1234567,
-            -1234567,
-            i128::MAX,
-            i128::MIN,
-        ])
-        .with_precision_and_scale(24, 2)
-        .unwrap(),
-    );
-    let options = CastOptions::default();
-    let d = black_box(decimals);
-    c.bench_function("cast_decimal", |b| {
-        b.iter(|| cast_with_options(&d, &DataType::Decimal128(6, 2), &options).unwrap());
-    });
-}
-
-criterion_group!(benches, criterion_benchmark);
-criterion_main!(benches);
diff --git a/arrow/benches/cast_kernels.rs b/arrow/benches/cast_kernels.rs
index ec7990d3d764..5c4fcff13dee 100644
--- a/arrow/benches/cast_kernels.rs
+++ b/arrow/benches/cast_kernels.rs
@@ -250,6 +250,9 @@ fn add_benchmark(c: &mut Criterion) {
     c.bench_function("cast decimal128 to decimal128 512", |b| {
         b.iter(|| cast_array(&decimal128_array, DataType::Decimal128(30, 5)))
     });
+    c.bench_function("cast decimal128 to decimal128 512 lower precision", |b| {
+        b.iter(|| cast_array(&decimal128_array, DataType::Decimal128(6, 5)))
+    });
     c.bench_function("cast decimal128 to decimal256 512", |b| {
         b.iter(|| cast_array(&decimal128_array, DataType::Decimal256(50, 5)))
     });