diff --git a/kclvm/sema/benches/my_benchmark.rs b/kclvm/sema/benches/my_benchmark.rs
index 5b0bc6fbf..aad5d526e 100644
--- a/kclvm/sema/benches/my_benchmark.rs
+++ b/kclvm/sema/benches/my_benchmark.rs
@@ -1,14 +1,19 @@
-use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use std::rc::Rc;
+
+use criterion::{criterion_group, criterion_main, Criterion};
 use kclvm_sema::ty::*;
 
 pub fn criterion_benchmark(c: &mut Criterion) {
     c.bench_function("sup", |b| {
         b.iter(|| {
             let types = vec![
-                Type::int_lit(1),
-                Type::INT,
-                Type::union(&[Type::STR, Type::dict(Type::STR, Type::STR)]),
-                Type::dict(Type::ANY, Type::ANY),
+                Rc::new(Type::int_lit(1)),
+                Rc::new(Type::INT),
+                Rc::new(Type::union(&[
+                    Rc::new(Type::STR),
+                    Rc::new(Type::dict(Rc::new(Type::STR), Rc::new(Type::STR))),
+                ])),
+                Rc::new(Type::dict(Rc::new(Type::ANY), Rc::new(Type::ANY))),
             ];
             sup(&types);
         })