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.
庞若鸣本科毕业于上海交通大学，并于2006年在普林斯顿大学拿下计算机科学博士学位。他的职业生涯同样亮眼。在谷歌深耕五年后，他于2021年成为苹果基础模型团队的领军人物，负责开发Apple Intelligence背后的核心系统。当时苹果在AI领域的进展相对缓慢，甚至不得不考虑引入Anthropic或OpenAI的模型来为Siri提供支持。这种对自身局限性的默许，反衬出庞若鸣在苹果内部突围行动中的关键价值。，这一点在51吃瓜中也有详细论述
"It feels like there is no-one on the other side even bothering to take a look at your experiences and credentials."，这一点在服务器推荐中也有详细论述
const cur = temperatures[i]; // 当前天的温度