Games and physics simulations need to detect which objects are touching or overlapping. With nnn objects, checking every pair is O(n2)O(n^2)O(n2) comparisons, which gets expensive fast. A hundred objects means roughly 5,000 pair checks. A thousand means nearly 500,000.
free_list[classno] = h->next;。雷电模拟器官方版本下载对此有专业解读
观察大国经济,不仅要看量,更要看质。,更多细节参见heLLoword翻译官方下载
“新花都”迎宾处旁,威风凛凛的关公像前仍香火兴旺,红色地毯两侧挤挤挨挨地摆着两行明灿灿的盆景菊花,刺眼的灯光恍如白昼。面带倦意的印度人抬抬手,与客人道晚安。电梯门关上,音乐骤停,一个时代的歌舞升平也被挡在了外面。
For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.