Use same benchmark names for comparison

Author: coderfender

datafusion/functions-aggregate/benches/count_distinct.rs

@@ -193,7 +193,7 @@ fn count_distinct_groups_benchmark(c: &mut Criterion) {
 
         if count_fn.groups_accumulator_supported(args.clone()) {
             c.bench_function(
-                &format!("count_distinct_groups i64 {num_groups} groups (GroupsAccumulator)"),
+                &format!("count_distinct_groups i64 {num_groups} groups"),
                 |b| {
                     b.iter(|| {
                         let (_schema, args) = prepare_args(DataType::Int64);
@@ -206,7 +206,7 @@ fn count_distinct_groups_benchmark(c: &mut Criterion) {
             );
         } else {
             c.bench_function(
-                &format!("count_distinct_groups i64 {num_groups} groups (N Accumulators)"),
+                &format!("count_distinct_groups i64 {num_groups} groups"),
                 |b| {
                     b.iter(|| {
                         let mut accumulators: Vec<_> = (0..num_groups)