The 3-delay-slot scheme works when there is useful work to fill those three cycles. But some instructions genuinely need the protection result before they can proceed. LAR (Load Access Rights) and VERR (Verify Read), for example, exist solely to query protection status -- there is no useful setup to overlap with.
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用。关于这个话题，safew官方版本下载提供了深入分析
What is this page?，详情可参考服务器推荐
await dropOld.writer.write(chunk1); // ok