diff --git a/core/extensions.rs b/core/extensions.rs
index 4f68ecf6c2..ead1fa3546 100644
--- a/core/extensions.rs
+++ b/core/extensions.rs
@@ -51,9 +51,6 @@ pub struct OpDecl {
   pub enabled: bool,
   pub is_async: bool,
   pub is_unstable: bool,
-  /// V8 argument count. Used as an optimization
-  /// hint by `core.initalizeAsyncOps`.
-  pub argc: usize,
   pub is_v8: bool,
   pub fast_fn: Option<Box<dyn FastFunction>>,
 }
diff --git a/ops/lib.rs b/ops/lib.rs
index 21812f6053..f7c69ec8a4 100644
--- a/ops/lib.rs
+++ b/ops/lib.rs
@@ -145,7 +145,6 @@ impl Op {
               is_async: #is_async,
               is_unstable: #is_unstable,
               is_v8: #is_v8,
-              argc: 0,
             }
           }
 
@@ -160,7 +159,7 @@ impl Op {
 
     let has_fallible_fast_call = active && optimizer.returns_result;
 
-    let (v8_body, argc) = if is_async {
+    let v8_body = if is_async {
       let deferred = attrs.deferred;
       codegen_v8_async(
         &core,
@@ -202,7 +201,6 @@ impl Op {
             is_async: #is_async,
             is_unstable: #is_unstable,
             is_v8: #is_v8,
-            argc: #argc,
           }
         }
 
@@ -239,7 +237,7 @@ fn codegen_v8_async(
   margs: Attributes,
   asyncness: bool,
   deferred: bool,
-) -> (TokenStream2, usize) {
+) -> TokenStream2 {
   let Attributes { is_v8, .. } = margs;
   let special_args = f
     .sig
@@ -253,7 +251,7 @@ fn codegen_v8_async(
   let rust_i0 = special_args.len();
   let args_head = special_args.into_iter().collect::<TokenStream2>();
 
-  let (arg_decls, args_tail, argc) = codegen_args(core, f, rust_i0, 1, true);
+  let (arg_decls, args_tail, _) = codegen_args(core, f, rust_i0, 1, true);
   let type_params = exclude_lifetime_params(&f.sig.generics.params);
 
   let (pre_result, mut result_fut) = match asyncness {
@@ -284,48 +282,45 @@ fn codegen_v8_async(
     false => quote! { let result = Ok(result); },
   };
 
-  (
-    quote! {
-      use #core::futures::FutureExt;
-      // SAFETY: #core guarantees args.data() is a v8 External pointing to an OpCtx for the isolates lifetime
-      let ctx = unsafe {
-        &*(#core::v8::Local::<#core::v8::External>::cast(args.data()).value()
-        as *const #core::_ops::OpCtx)
-      };
-      let op_id = ctx.id;
-      let realm_idx = ctx.realm_idx;
+  quote! {
+    use #core::futures::FutureExt;
+    // SAFETY: #core guarantees args.data() is a v8 External pointing to an OpCtx for the isolates lifetime
+    let ctx = unsafe {
+      &*(#core::v8::Local::<#core::v8::External>::cast(args.data()).value()
+      as *const #core::_ops::OpCtx)
+    };
+    let op_id = ctx.id;
+    let realm_idx = ctx.realm_idx;
 
-      let promise_id = args.get(0);
-      let promise_id = #core::v8::Local::<#core::v8::Integer>::try_from(promise_id)
-        .map(|l| l.value() as #core::PromiseId)
-        .map_err(#core::anyhow::Error::from);
-      // Fail if promise id invalid (not an int)
-      let promise_id: #core::PromiseId = match promise_id {
-        Ok(promise_id) => promise_id,
-        Err(err) => {
-          #core::_ops::throw_type_error(scope, format!("invalid promise id: {}", err));
-          return;
-        }
-      };
+    let promise_id = args.get(0);
+    let promise_id = #core::v8::Local::<#core::v8::Integer>::try_from(promise_id)
+      .map(|l| l.value() as #core::PromiseId)
+      .map_err(#core::anyhow::Error::from);
+    // Fail if promise id invalid (not an int)
+    let promise_id: #core::PromiseId = match promise_id {
+      Ok(promise_id) => promise_id,
+      Err(err) => {
+        #core::_ops::throw_type_error(scope, format!("invalid promise id: {}", err));
+        return;
+      }
+    };
 
-      #arg_decls
+    #arg_decls
 
-      // Track async call & get copy of get_error_class_fn
-      let get_class = {
-        let state = ::std::cell::RefCell::borrow(&ctx.state);
-        state.tracker.track_async(op_id);
-        state.get_error_class_fn
-      };
+    // Track async call & get copy of get_error_class_fn
+    let get_class = {
+      let state = ::std::cell::RefCell::borrow(&ctx.state);
+      state.tracker.track_async(op_id);
+      state.get_error_class_fn
+    };
 
-      #pre_result
-      #core::_ops::queue_async_op(ctx, scope, #deferred, async move {
-        let result = #result_fut
-        #result_wrapper
-        (realm_idx, promise_id, op_id, #core::_ops::to_op_result(get_class, result))
-      });
-    },
-    argc,
-  )
+    #pre_result
+    #core::_ops::queue_async_op(ctx, scope, #deferred, async move {
+      let result = #result_fut
+      #result_wrapper
+      (realm_idx, promise_id, op_id, #core::_ops::to_op_result(get_class, result))
+    });
+  }
 }
 
 fn scope_arg(arg: &FnArg) -> Option<TokenStream2> {
@@ -362,7 +357,7 @@ fn codegen_v8_sync(
   f: &syn::ItemFn,
   margs: Attributes,
   has_fallible_fast_call: bool,
-) -> (TokenStream2, usize) {
+) -> TokenStream2 {
   let Attributes { is_v8, .. } = margs;
   let special_args = f
     .sig
@@ -374,7 +369,7 @@ fn codegen_v8_sync(
     .collect::<Vec<_>>();
   let rust_i0 = special_args.len();
   let args_head = special_args.into_iter().collect::<TokenStream2>();
-  let (arg_decls, args_tail, argc) = codegen_args(core, f, rust_i0, 0, false);
+  let (arg_decls, args_tail, _) = codegen_args(core, f, rust_i0, 0, false);
   let ret = codegen_sync_ret(core, &f.sig.output);
   let type_params = exclude_lifetime_params(&f.sig.generics.params);
 
@@ -393,27 +388,24 @@ fn codegen_v8_sync(
     quote! {}
   };
 
-  (
-    quote! {
-      // SAFETY: #core guarantees args.data() is a v8 External pointing to an OpCtx for the isolates lifetime
-      let ctx = unsafe {
-        &*(#core::v8::Local::<#core::v8::External>::cast(args.data()).value()
-        as *const #core::_ops::OpCtx)
-      };
+  quote! {
+    // SAFETY: #core guarantees args.data() is a v8 External pointing to an OpCtx for the isolates lifetime
+    let ctx = unsafe {
+      &*(#core::v8::Local::<#core::v8::External>::cast(args.data()).value()
+      as *const #core::_ops::OpCtx)
+    };
 
-      #fast_error_handler
-      #arg_decls
+    #fast_error_handler
+    #arg_decls
 
-      let result = Self::call::<#type_params>(#args_head #args_tail);
+    let result = Self::call::<#type_params>(#args_head #args_tail);
 
-      // use RefCell::borrow instead of state.borrow to avoid clash with std::borrow::Borrow
-      let op_state = ::std::cell::RefCell::borrow(&*ctx.state);
-      op_state.tracker.track_sync(ctx.id);
+    // use RefCell::borrow instead of state.borrow to avoid clash with std::borrow::Borrow
+    let op_state = ::std::cell::RefCell::borrow(&*ctx.state);
+    op_state.tracker.track_sync(ctx.id);
 
-      #ret
-    },
-    argc,
-  )
+    #ret
+  }
 }
 
 /// (full declarations, idents, v8 argument count)
diff --git a/ops/optimizer_tests/async_nop.out b/ops/optimizer_tests/async_nop.out
index b59eedf9b2..1fed63735d 100644
--- a/ops/optimizer_tests/async_nop.out
+++ b/ops/optimizer_tests/async_nop.out
@@ -26,7 +26,6 @@ impl op_void_async {
             is_async: true,
             is_unstable: false,
             is_v8: false,
-            argc: 0usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/async_result.out b/ops/optimizer_tests/async_result.out
index b812e4cef3..7270ca3d52 100644
--- a/ops/optimizer_tests/async_result.out
+++ b/ops/optimizer_tests/async_result.out
@@ -26,7 +26,6 @@ impl op_async_result {
             is_async: true,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/callback_options.out b/ops/optimizer_tests/callback_options.out
index 81745375d3..be84d686a4 100644
--- a/ops/optimizer_tests/callback_options.out
+++ b/ops/optimizer_tests/callback_options.out
@@ -26,7 +26,6 @@ impl op_fallback {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/cow_str.out b/ops/optimizer_tests/cow_str.out
index da405f451d..c1c4917f65 100644
--- a/ops/optimizer_tests/cow_str.out
+++ b/ops/optimizer_tests/cow_str.out
@@ -26,7 +26,6 @@ impl op_cow_str {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/f64_slice.out b/ops/optimizer_tests/f64_slice.out
index 88ccd232ad..9526d988a5 100644
--- a/ops/optimizer_tests/f64_slice.out
+++ b/ops/optimizer_tests/f64_slice.out
@@ -26,7 +26,6 @@ impl op_f64_buf {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/incompatible_1.out b/ops/optimizer_tests/incompatible_1.out
index 92cf4a5764..cedfb1a8f9 100644
--- a/ops/optimizer_tests/incompatible_1.out
+++ b/ops/optimizer_tests/incompatible_1.out
@@ -22,7 +22,6 @@ impl op_sync_serialize_object_with_numbers_as_keys {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/issue16934.out b/ops/optimizer_tests/issue16934.out
index b823b5d533..2b8df30d29 100644
--- a/ops/optimizer_tests/issue16934.out
+++ b/ops/optimizer_tests/issue16934.out
@@ -22,7 +22,6 @@ impl send_stdin {
             is_async: true,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/issue16934_fast.out b/ops/optimizer_tests/issue16934_fast.out
index 8ff9bad4f2..cf1e416800 100644
--- a/ops/optimizer_tests/issue16934_fast.out
+++ b/ops/optimizer_tests/issue16934_fast.out
@@ -22,7 +22,6 @@ impl send_stdin {
             is_async: true,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_blob_revoke_object_url.out b/ops/optimizer_tests/op_blob_revoke_object_url.out
index ac51c0de7e..8c5a569a50 100644
--- a/ops/optimizer_tests/op_blob_revoke_object_url.out
+++ b/ops/optimizer_tests/op_blob_revoke_object_url.out
@@ -22,7 +22,6 @@ impl op_blob_revoke_object_url {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_ffi_ptr_value.out b/ops/optimizer_tests/op_ffi_ptr_value.out
index bfbbd5ae75..5ef91e21f0 100644
--- a/ops/optimizer_tests/op_ffi_ptr_value.out
+++ b/ops/optimizer_tests/op_ffi_ptr_value.out
@@ -26,7 +26,6 @@ impl op_ffi_ptr_value {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_print.out b/ops/optimizer_tests/op_print.out
index bafa0b9f83..f22553c767 100644
--- a/ops/optimizer_tests/op_print.out
+++ b/ops/optimizer_tests/op_print.out
@@ -22,7 +22,6 @@ impl op_print {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_state.out b/ops/optimizer_tests/op_state.out
index 5b273960a6..520d41e1a0 100644
--- a/ops/optimizer_tests/op_state.out
+++ b/ops/optimizer_tests/op_state.out
@@ -26,7 +26,6 @@ impl op_set_exit_code {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_state_basic1.out b/ops/optimizer_tests/op_state_basic1.out
index ab3404a429..7d803ac398 100644
--- a/ops/optimizer_tests/op_state_basic1.out
+++ b/ops/optimizer_tests/op_state_basic1.out
@@ -26,7 +26,6 @@ impl foo {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_state_generics.out b/ops/optimizer_tests/op_state_generics.out
index bd5e40afe8..28315eb261 100644
--- a/ops/optimizer_tests/op_state_generics.out
+++ b/ops/optimizer_tests/op_state_generics.out
@@ -32,7 +32,6 @@ impl op_foo {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 0usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_state_result.out b/ops/optimizer_tests/op_state_result.out
index 76070b5363..0b7301bfc3 100644
--- a/ops/optimizer_tests/op_state_result.out
+++ b/ops/optimizer_tests/op_state_result.out
@@ -26,7 +26,6 @@ impl foo {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_state_warning.out b/ops/optimizer_tests/op_state_warning.out
index 9917fbf79d..1942a6376d 100644
--- a/ops/optimizer_tests/op_state_warning.out
+++ b/ops/optimizer_tests/op_state_warning.out
@@ -26,7 +26,6 @@ impl op_listen {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 0usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/op_state_with_transforms.out b/ops/optimizer_tests/op_state_with_transforms.out
index b2ded3c5a4..ecd56ceeb3 100644
--- a/ops/optimizer_tests/op_state_with_transforms.out
+++ b/ops/optimizer_tests/op_state_with_transforms.out
@@ -32,7 +32,6 @@ impl op_now {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/opstate_with_arity.out b/ops/optimizer_tests/opstate_with_arity.out
index 132e54aeff..7c831ccfec 100644
--- a/ops/optimizer_tests/opstate_with_arity.out
+++ b/ops/optimizer_tests/opstate_with_arity.out
@@ -26,7 +26,6 @@ impl op_add_4 {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 4usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/option_arg.out b/ops/optimizer_tests/option_arg.out
index 9f647765f4..14dca54877 100644
--- a/ops/optimizer_tests/option_arg.out
+++ b/ops/optimizer_tests/option_arg.out
@@ -22,7 +22,6 @@ impl op_try_close {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/owned_string.out b/ops/optimizer_tests/owned_string.out
index 4892221f81..56d3cbfdca 100644
--- a/ops/optimizer_tests/owned_string.out
+++ b/ops/optimizer_tests/owned_string.out
@@ -26,7 +26,6 @@ impl op_string_length {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/param_mut_binding_warning.out b/ops/optimizer_tests/param_mut_binding_warning.out
index daccc28abb..3a93a738f7 100644
--- a/ops/optimizer_tests/param_mut_binding_warning.out
+++ b/ops/optimizer_tests/param_mut_binding_warning.out
@@ -22,7 +22,6 @@ impl op_read_sync {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/raw_ptr.out b/ops/optimizer_tests/raw_ptr.out
index cf678ddb9d..2b4e8c0b4a 100644
--- a/ops/optimizer_tests/raw_ptr.out
+++ b/ops/optimizer_tests/raw_ptr.out
@@ -32,7 +32,6 @@ impl op_ffi_ptr_of {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/serde_v8_value.out b/ops/optimizer_tests/serde_v8_value.out
index d4f2c0321d..3ea0aacb31 100644
--- a/ops/optimizer_tests/serde_v8_value.out
+++ b/ops/optimizer_tests/serde_v8_value.out
@@ -26,7 +26,6 @@ impl op_is_proxy {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/strings.out b/ops/optimizer_tests/strings.out
index 41f09c4f8d..8aa93a37a0 100644
--- a/ops/optimizer_tests/strings.out
+++ b/ops/optimizer_tests/strings.out
@@ -26,7 +26,6 @@ impl op_string_length {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/strings_result.out b/ops/optimizer_tests/strings_result.out
index 8446a603bc..fd847d9ca8 100644
--- a/ops/optimizer_tests/strings_result.out
+++ b/ops/optimizer_tests/strings_result.out
@@ -22,7 +22,6 @@ impl op_string_length {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/u64_result.out b/ops/optimizer_tests/u64_result.out
index 0039c75751..efe6c9d23f 100644
--- a/ops/optimizer_tests/u64_result.out
+++ b/ops/optimizer_tests/u64_result.out
@@ -22,7 +22,6 @@ impl op_bench_now {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 0usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/uint8array.out b/ops/optimizer_tests/uint8array.out
index bd7fa4d87e..06e50ce662 100644
--- a/ops/optimizer_tests/uint8array.out
+++ b/ops/optimizer_tests/uint8array.out
@@ -26,7 +26,6 @@ impl op_import_spki_x25519 {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/unit_result.out b/ops/optimizer_tests/unit_result.out
index f4e87ffa3f..082d29a453 100644
--- a/ops/optimizer_tests/unit_result.out
+++ b/ops/optimizer_tests/unit_result.out
@@ -26,7 +26,6 @@ impl op_unit_result {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 0usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/unit_result2.out b/ops/optimizer_tests/unit_result2.out
index d1df0e0415..6f5a5915d7 100644
--- a/ops/optimizer_tests/unit_result2.out
+++ b/ops/optimizer_tests/unit_result2.out
@@ -26,7 +26,6 @@ impl op_set_nodelay {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 2usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/unit_ret.out b/ops/optimizer_tests/unit_ret.out
index c18fa19152..3924beb537 100644
--- a/ops/optimizer_tests/unit_ret.out
+++ b/ops/optimizer_tests/unit_ret.out
@@ -26,7 +26,6 @@ impl op_unit {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 0usize,
         }
     }
     #[inline]
diff --git a/ops/optimizer_tests/wasm_op.out b/ops/optimizer_tests/wasm_op.out
index a40beb158e..219537f607 100644
--- a/ops/optimizer_tests/wasm_op.out
+++ b/ops/optimizer_tests/wasm_op.out
@@ -26,7 +26,6 @@ impl op_wasm {
             is_async: false,
             is_unstable: false,
             is_v8: false,
-            argc: 1usize,
         }
     }
     #[inline]