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perf: new_string_owned 零拷贝路径替代 new_string 二次克隆
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@@ -75,6 +75,8 @@ pub trait VmHost {
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// 对象分配 / 字符串创建
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fn alloc_object(&mut self, obj: JsObject) -> *mut JsObject;
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fn new_string(&mut self, s: &str) -> JsValue;
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/// move 接收 `String` 创建会话字符串,避免一次整串克隆。
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fn new_string_owned(&mut self, s: String) -> JsValue;
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/// 分配 BigInt 值(num_bigint::BigInt box 登记到 VM,返回携带指针的 `JsValue`)。
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fn new_bigint(&mut self, v: num_bigint::BigInt) -> JsValue;
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/// 读取 BigInt 值;调用方须保证 `val.is_bigint()`。
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