The tradeoff is complexity. The microcode must be carefully arranged so that the instructions in delay slots are either useful setup for both paths, or at least harmless if the redirect fires. Not every case is as clean as RETF. When a PLA redirect interrupts an LCALL, the return address is already pushed onto the microcode call stack (yes, the 386 has a microcode call stack) -- the redirected code must account for this stale entry. When multiple protection tests overlap, or when a redirect fires during a delay slot of another jump, the control flow becomes hard to reason about. During the FPGA core implementation, protection delay slot interactions were consistently the most difficult bugs to track down.
文 | 螺旋实验室，作者丨追命，编辑丨坚果
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strict.writer.write(chunk5); // throws! too many pending writes
成本优化是云计算实践中的一个永恒话题，合理的资源规划可以显著降低支出。
每轮遍历后，最大元素会"冒泡"到末尾