diff --git a/datafusion/functions/benches/repeat.rs b/datafusion/functions/benches/repeat.rs
index 916c8374e5fb..e45313660ea2 100644
--- a/datafusion/functions/benches/repeat.rs
+++ b/datafusion/functions/benches/repeat.rs
@@ -67,7 +67,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args::<i32>(size, 32, repeat_times, true);
         group.bench_function(
-            &format!(
+            format!(
                 "repeat_string_view [size={}, repeat_times={}]",
                 size, repeat_times
             ),
@@ -76,7 +76,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args::<i32>(size, 32, repeat_times, false);
         group.bench_function(
-            &format!(
+            format!(
                 "repeat_string [size={}, repeat_times={}]",
                 size, repeat_times
             ),
@@ -85,7 +85,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args::<i64>(size, 32, repeat_times, false);
         group.bench_function(
-            &format!(
+            format!(
                 "repeat_large_string [size={}, repeat_times={}]",
                 size, repeat_times
             ),
@@ -103,7 +103,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args::<i32>(size, 32, repeat_times, true);
         group.bench_function(
-            &format!(
+            format!(
                 "repeat_string_view [size={}, repeat_times={}]",
                 size, repeat_times
             ),
@@ -112,7 +112,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args::<i32>(size, 32, repeat_times, false);
         group.bench_function(
-            &format!(
+            format!(
                 "repeat_string [size={}, repeat_times={}]",
                 size, repeat_times
             ),
@@ -121,7 +121,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args::<i64>(size, 32, repeat_times, false);
         group.bench_function(
-            &format!(
+            format!(
                 "repeat_large_string [size={}, repeat_times={}]",
                 size, repeat_times
             ),
diff --git a/datafusion/functions/benches/substr.rs b/datafusion/functions/benches/substr.rs
index 14a3389da380..1a696520c3ad 100644
--- a/datafusion/functions/benches/substr.rs
+++ b/datafusion/functions/benches/substr.rs
@@ -106,19 +106,19 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_without_count::<i32>(size, len, true, true);
         group.bench_function(
-            &format!("substr_string_view [size={}, strlen={}]", size, len),
+            format!("substr_string_view [size={}, strlen={}]", size, len),
             |b| b.iter(|| black_box(substr.invoke(&args))),
         );
 
         let args = create_args_without_count::<i32>(size, len, false, false);
         group.bench_function(
-            &format!("substr_string [size={}, strlen={}]", size, len),
+            format!("substr_string [size={}, strlen={}]", size, len),
             |b| b.iter(|| black_box(substr.invoke(&args))),
         );
 
         let args = create_args_without_count::<i64>(size, len, true, false);
         group.bench_function(
-            &format!("substr_large_string [size={}, strlen={}]", size, len),
+            format!("substr_large_string [size={}, strlen={}]", size, len),
             |b| b.iter(|| black_box(substr.invoke(&args))),
         );
 
@@ -133,7 +133,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_with_count::<i32>(size, len, count, true);
         group.bench_function(
-            &format!(
+            format!(
                 "substr_string_view [size={}, count={}, strlen={}]",
                 size, count, len,
             ),
@@ -142,7 +142,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_with_count::<i32>(size, len, count, false);
         group.bench_function(
-            &format!(
+            format!(
                 "substr_string [size={}, count={}, strlen={}]",
                 size, count, len,
             ),
@@ -151,7 +151,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_with_count::<i64>(size, len, count, false);
         group.bench_function(
-            &format!(
+            format!(
                 "substr_large_string [size={}, count={}, strlen={}]",
                 size, count, len,
             ),
@@ -169,7 +169,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_with_count::<i32>(size, len, count, true);
         group.bench_function(
-            &format!(
+            format!(
                 "substr_string_view [size={}, count={}, strlen={}]",
                 size, count, len,
             ),
@@ -178,7 +178,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_with_count::<i32>(size, len, count, false);
         group.bench_function(
-            &format!(
+            format!(
                 "substr_string [size={}, count={}, strlen={}]",
                 size, count, len,
             ),
@@ -187,7 +187,7 @@ fn criterion_benchmark(c: &mut Criterion) {
 
         let args = create_args_with_count::<i64>(size, len, count, false);
         group.bench_function(
-            &format!(
+            format!(
                 "substr_large_string [size={}, count={}, strlen={}]",
                 size, count, len,
             ),