javascript - node.js 中的 inlineable 是什么？

Question

下面是来自 Node.js 源代码事件模块的代码，我不知道这条评论的意思是：这段代码是重复的，因为将其提取会使其不可内联。

  if (typeof handler === 'function') {
    const result = ReflectApply(handler, this, args);

    // We check if result is undefined first because that
    // is the most common case so we do not pay any perf
    // penalty
    if (result !== undefined && result !== null) {
      addCatch(this, result, type, args);
    }
  } else {
    const len = handler.length;
    const listeners = arrayClone(handler, len);
    for (let i = 0; i < len; ++i) {
      const result = ReflectApply(listeners[i], this, args);

      // We check if result is undefined first because that
      // is the most common case so we do not pay any perf
      // penalty.
      // This code is duplicated because extracting it away
      // would make it non-inlineable.
      if (result !== undefined && result !== null) {
        addCatch(this, result, type, args);
      }
    }
  }

标签： javascriptnode.jsevents