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.
"It felt like one of those special sites that you do get every so often," he said.
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"It's clearly not just a place for the dead. There's a living community here as well."
Los Angeles is finally extending its transit system to the tony streets of Beverly Hills, announcing on Thursday that a 4-mile extension of the D Line subway opens on May 8.