diff --git a/godot-core/src/builtin/callable.rs b/godot-core/src/builtin/callable.rs
index 272c79271..ca43f54e4 100644
--- a/godot-core/src/builtin/callable.rs
+++ b/godot-core/src/builtin/callable.rs
@@ -654,11 +654,14 @@ mod custom_callable {
     ) {
         let arg_refs: &[&Variant] = Variant::borrow_ref_slice(p_args, p_argument_count as usize);
 
-        let name = {
+        #[cfg(debug_assertions)]
+        let name = &{
             let c: &C = CallableUserdata::inner_from_raw(callable_userdata);
             c.to_string()
         };
-        let ctx = meta::CallContext::custom_callable(name.as_str());
+        #[cfg(not(debug_assertions))]
+        let name = "<optimized out>";
+        let ctx = meta::CallContext::custom_callable(name);
 
         crate::private::handle_varcall_panic(&ctx, &mut *r_error, move || {
             // Get the RustCallable again inside closure so it doesn't have to be UnwindSafe.
@@ -681,11 +684,14 @@ mod custom_callable {
     {
         let arg_refs: &[&Variant] = Variant::borrow_ref_slice(p_args, p_argument_count as usize);
 
-        let name = {
+        #[cfg(debug_assertions)]
+        let name = &{
             let w: &FnWrapper<F> = CallableUserdata::inner_from_raw(callable_userdata);
             w.name.to_string()
         };
-        let ctx = meta::CallContext::custom_callable(name.as_str());
+        #[cfg(not(debug_assertions))]
+        let name = "<optimized out>";
+        let ctx = meta::CallContext::custom_callable(name);
 
         crate::private::handle_varcall_panic(&ctx, &mut *r_error, move || {
             // Get the FnWrapper again inside closure so the FnMut doesn't have to be UnwindSafe.
diff --git a/itest/rust/src/benchmarks/mod.rs b/itest/rust/src/benchmarks/mod.rs
index 77312090b..6d41bec56 100644
--- a/itest/rust/src/benchmarks/mod.rs
+++ b/itest/rust/src/benchmarks/mod.rs
@@ -13,6 +13,7 @@ use godot::builtin::inner::InnerRect2i;
 use godot::builtin::{GString, PackedInt32Array, Rect2i, StringName, Vector2i};
 use godot::classes::{Node3D, Os, RefCounted};
 use godot::obj::{Gd, InstanceId, NewAlloc, NewGd, Singleton};
+use godot::prelude::{varray, Callable, RustCallable, Variant};
 use godot::register::GodotClass;
 
 use crate::framework::bench;
@@ -113,9 +114,36 @@ fn packed_array_from_iter_unknown_size() -> PackedInt32Array {
     }))
 }
 
+#[bench(repeat = 25)]
+fn call_callv_rust_fn() -> Variant {
+    let callable = Callable::from_fn("RustFunction", |_| ());
+    callable.callv(&varray![])
+}
+
+#[bench(repeat = 25)]
+fn call_callv_custom() -> Variant {
+    let callable = Callable::from_custom(MyRustCallable {});
+    callable.callv(&varray![])
+}
+
 // ----------------------------------------------------------------------------------------------------------------------------------------------
 // Helpers for benchmarks above
 
 #[derive(GodotClass)]
 #[class(init)]
 struct MyBenchType {}
+
+#[derive(PartialEq, Hash)]
+struct MyRustCallable {}
+
+impl RustCallable for MyRustCallable {
+    fn invoke(&mut self, _args: &[&Variant]) -> Variant {
+        Variant::nil()
+    }
+}
+
+impl std::fmt::Display for MyRustCallable {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "MyRustCallable")
+    }
+}