Sixty-eight hours after take-off, they made it.
Жители Санкт-Петербурга устроили «крысогон»17:52
，这一点在safew官方版本下载中也有详细论述
"It's just a lot of extra waste that could be disposed of in a greener way," she said.
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.