perf: 函数调用 bytecode 改 Arc 共享（O(1) 帧切换 + IC 写时复制）

2026-08-10 15:08:51 +08:00
parent dce613959f
commit eaf4825e4f
12 changed files with 72 additions and 50 deletions
@@ -156,7 +156,7 @@ impl Vm {
    ) -> Result<(), String> {
        self.regs = [JsValue::undefined(); 256];
        self.pc = 0;
-        self.bytecode = Vec::new();
+        self.bytecode = Arc::default();
        self.active_reg_limit = 1;
        self.root_reg_limit = 1;
        self.try_stack.clear();
@@ -222,7 +222,7 @@ impl Vm {

        self.regs = [JsValue::undefined(); 256];
        self.pc = 0;
-        self.bytecode = sub.bytecode.clone();
+        self.bytecode = Arc::clone(&sub.bytecode);
        self.activate_immutables(sub_idx, &sub.constants);
        self.active_reg_limit = sub.n_registers.max(1);
        self.root_reg_limit = self.active_reg_limit;
@@ -300,7 +300,7 @@ impl Vm {
        vm_info!("rerun: clearing IC caches");
        self.clear_execution_state();
        self.active_reg_limit = self.root_reg_limit;
-        crate::ic_helper::clear_ic_caches(&mut self.bytecode);
+        crate::ic_helper::clear_ic_caches(self.bytecode_mut());
        self.dispatch()
    }

@@ -315,7 +315,7 @@ impl Vm {
        self.cell_stack.push(Vec::new());
        self.sub_modules = Arc::new(collect_flat_modules(module));
        self.immutables_cache = (0..self.sub_modules.len()).map(|_| OnceLock::new()).collect();
-        self.bytecode = module.bytecode.clone();
+        self.bytecode = Arc::clone(&module.bytecode);
        self.activate_immutables(0, &module.constants);
        self.root_reg_limit = module.n_registers.max(1);
        self.active_reg_limit = self.root_reg_limit;