perf: 实参打包缓冲回退 Vec（A/B 实测无可测收益）

Cargo.lock

@@ -1095,7 +1095,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_builtins"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "chrono",
  "fast-float",
@@ -1120,7 +1120,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_bytecode"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "num-bigint",
  "oxide_log",
@@ -1128,7 +1128,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cfg"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_emit",
@@ -1139,7 +1139,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cli"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "ansi_term",
  "bumpalo",
@@ -1159,7 +1159,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_code_cache"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "lru",
  "oxide_bytecode",
@@ -1168,7 +1168,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_compiler"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1187,7 +1187,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_dce"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1201,7 +1201,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_emit"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "num-bigint",
  "oxc_allocator",
@@ -1216,7 +1216,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_ir"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_log",
@@ -1225,7 +1225,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_kernel"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1240,7 +1240,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_liveness"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1252,7 +1252,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_log"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "tracing",
  "tracing-appender",
@@ -1261,7 +1261,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_parser"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxc_allocator",
  "oxc_ast",
@@ -1276,7 +1276,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_regalloc"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1292,7 +1292,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_runtime_api"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "num-bigint",
  "num-traits",
@@ -1304,7 +1304,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_test262"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1321,7 +1321,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_types"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "bumpalo",
  "hashbrown 0.14.5",
@@ -1333,7 +1333,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_vm"
-version = "0.8.2"
+version = "0.8.3"
 dependencies = [
  "bumpalo",
  "chrono",

Cargo.toml

@@ -22,7 +22,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.8.2"
+version = "0.8.3"
 edition = "2021"
 license = "MIT"
 rust-version = "1.80"

crates/oxide_vm/src/vm/call.rs

@@ -6,7 +6,6 @@ use std::sync::Arc;
 use oxide_runtime_api::NativeResult;
 use oxide_types::object::{Cell, JsObject};
 use oxide_types::value::JsValue;
-use smallvec::SmallVec;
 
 use super::frames::{CallFrame, FrameArgs, FrameContinuation};
 use super::{native_fn_ptr_to_fn, Vm};
@@ -14,14 +13,11 @@ use crate::native::NativeFn;
 use crate::{vm_debug, vm_trace};
 
 impl Vm {
-    fn pack_sync_native_call_args(
-        &mut self, receiver: JsValue, callee: JsValue, args: &[JsValue],
-    ) -> SmallVec<[u8; 256]> {
+    fn pack_sync_native_call_args(&mut self, receiver: JsValue, callee: JsValue, args: &[JsValue]) -> Vec<u8> {
         self.regs[253] = receiver;
         self.regs[254] = callee;
 
-        // 实参寄存器号列表容量恒 ≤ 254（253 实参 + receiver），栈内缓冲免每次 native 调用堆分配。
-        let mut arg_regs = SmallVec::new();
+        let mut arg_regs = Vec::with_capacity(args.len() + 1);
         arg_regs.push(253);
         for (idx, arg) in args.iter().enumerate() {
             let reg = (Self::SYNC_NATIVE_ARG_BASE + idx) as u8;