const MS = window.MediaSource || window.ManagedMediaSource;
答案并不抽象。它写在习近平主席二〇二六年新年贺词里：“柴米油盐、三餐四季，每个‘小家’热气腾腾，中国这个‘大家’就蒸蒸日上。”，更多细节参见51吃瓜
The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.。heLLoword翻译官方下载对此有专业解读
"They're lovely, but they're problematic too," says Graeme Peart from St Margaret's Church, Saxlingham, just a few miles from Guestwick.
I found one dumb free win (I mistakenly used value receivers on a utility function called on a large struct thousands of times a frame). But the rest of the speedups I found took more effort.