diff --git a/benchmarks/toy-rs/Cargo.toml b/benchmarks/toy-rs/Cargo.toml
index 2966794..faa1e42 100644
--- a/benchmarks/toy-rs/Cargo.toml
+++ b/benchmarks/toy-rs/Cargo.toml
@@ -6,4 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-coz = "0.1"
\ No newline at end of file
+coz = "0.1"
+
+[profile.dev]
+opt-level = 2
+debug = true