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.
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If you've followed casting news or paid attention in the trailers, you know Matthew Lillard, who played Stu Macher in Scream, is back for Scream 7. It's what some fans (this one included) have been waiting for — especially after Skeet Ulrich started popping up as a delusion/ghost dad Billy Loomis in 5-VI.