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.
TechCrunch Disrupt 2026
，详情可参考WPS官方版本下载
Read more global business storiesThe shadowy world of abandoned oil tankers
We spend a lot of time sourcing the best deals on just about everything, so we know what sells. And you know what really gets the people going? Lego and Pokémon.