Touching grass: one of several interests that Nava shares with fictional Roman gladiators.
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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优点： 表达力更强、梯度更平滑，性能优于 ReLU/GELU。