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perf: 三处手写压帧收敛单一入口并免实参堆 Vec 物化

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彭俊皓
2026-08-15 10:27:14 +08:00
parent d9acda7417
commit 37252e55b5
7 changed files with 120 additions and 186 deletions
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crates/oxide_vm/src/vm_dispatch_ctrl.rs
+29 -25
View File
@@ -1,4 +1,4 @@
use crate::vm::{Completion, FrameContinuation, TryHandler, Vm};
use crate::vm::{Completion, FrameArgs, FrameContinuation, TryHandler, Vm};
use crate::vm_trace;
use oxide_bytecode::opcode;
use oxide_types::object::PropAttributes;
@@ -34,35 +34,39 @@ impl Vm {
return Ok(true);
} else if obj.sub_module_index() > 0 {
let sub_idx = obj.sub_module_index() as usize;
let args: Vec<JsValue> = (0..arg_count)
.map(|i| self.regs[first_arg_reg.wrapping_add(i as u8) as usize])
.collect();
// 异步生成器函数调用返回异步生成器迭代器对象。
if sub_idx < self.sub_modules.len()
&& self.sub_modules[sub_idx].is_generator
&& self.sub_modules[sub_idx].is_async
{
let gen =
self.create_async_generator_object(callee, self.regs[this_reg as usize], &args)?;
self.regs[0] = gen;
return Ok(false);
}
// 生成器函数调用返回迭代器对象，不执行函数体。
if sub_idx < self.sub_modules.len() && self.sub_modules[sub_idx].is_generator {
let gen = self.create_generator_object(callee, self.regs[this_reg as usize], &args)?;
self.regs[0] = gen;
return Ok(false);
}
// 异步函数调用返回 capability promise，立即同步执行 body 到首个 await。
if sub_idx < self.sub_modules.len() && self.sub_modules[sub_idx].is_async {
let promise = self.create_async_object(callee, self.regs[this_reg as usize], &args)?;
let this_value = self.regs[this_reg as usize];
let is_generator = sub_idx < self.sub_modules.len() && self.sub_modules[sub_idx].is_generator;
let is_async = sub_idx < self.sub_modules.len() && self.sub_modules[sub_idx].is_async;
// 生成器/异步路径需把实参物化存进状态盒；普通字节码调用直接
// 引用寄存器连续区间，免临时堆 Vec（每次调用省 1 次分配）。
if is_generator || is_async {
let args: Vec<JsValue> = (0..arg_count)
.map(|i| self.regs[first_arg_reg.wrapping_add(i as u8) as usize])
.collect();
// 异步生成器函数调用返回异步生成器迭代器对象。
if is_generator && is_async {
let gen = self.create_async_generator_object(callee, this_value, &args)?;
self.regs[0] = gen;
return Ok(false);
}
// 生成器函数调用返回迭代器对象，不执行函数体。
if is_generator {
let gen = self.create_generator_object(callee, this_value, &args)?;
self.regs[0] = gen;
return Ok(false);
}
// 异步函数调用返回 capability promise，立即同步执行 body 到首个 await。
let promise = self.create_async_object(callee, this_value, &args)?;
self.regs[0] = promise;
return Ok(false);
}
self.push_bytecode_frame(
callee,
self.regs[this_reg as usize],
&args,
this_value,
FrameArgs::RegRange {
first: first_arg_reg,
count: arg_count,
},
None,
None,
JsValue::undefined(),