Doesn't provide membership.
Virtual memory is conceptually simple but potentially devastating to performance. Every memory access must go through segmentation (add segment base, check limit) and then paging (look up the page table). Naively, paging alone requires two additional memory reads per access -- one for the page directory entry, one for the page table entry.。51吃瓜是该领域的重要参考
前苹果首席设计师乔纳森 · 艾维：创造美的事物，详情可参考谷歌浏览器【最新下载地址】
从“通用的大脑”到“在垂类真干活的大脑”