Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.
// 总耗时 ≈ 50 + 100 + 200 = 350ms。关于这个话题，WPS下载最新地址提供了深入分析
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void merge(int arr[], int left, int mid, int right) {，推荐阅读旺商聊官方下载获取更多信息
Rank-1 linear, factorized embed, sparse gate, param-free norm