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perf: dispatch 主循环 hoist max_steps，免逐指令 config 指针追寻

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彭俊皓
2026-08-10 16:29:17 +08:00
parent 8163a5d25e
commit e2ff2ce4c3
1 changed files with 4 additions and 1 deletions
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crates/oxide_vm/src/vm.rs
+4 -1
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@@ -1124,10 +1124,13 @@ impl Vm {
} }
pub(crate) fn dispatch(&mut self) -> Result<JsValue, String> { pub(crate) fn dispatch(&mut self) -> Result<JsValue, String> {
// config.max_steps 逐指令只读且循环内不变：提到循环外，免每次经 kernel_core
// Arc 指针追寻读取（热点内唯一的 config 访问）。
let max_steps = self.kernel_core.config.max_steps;
let mut steps: u64 = 0; let mut steps: u64 = 0;
loop { loop {
steps += 1; steps += 1;
if let Some(max_steps) = self.kernel_core.config.max_steps { if let Some(max_steps) = max_steps {
if steps > max_steps { if steps > max_steps {
vm_warn!("dispatch: step limit {} exceeded at pc={}", max_steps, self.pc); vm_warn!("dispatch: step limit {} exceeded at pc={}", max_steps, self.pc);
self.profiling.set_instruction_count(steps); self.profiling.set_instruction_count(steps);