res = res.slice(0, res.length - k);
The R-sequence is another type of low-discrepancy sequence based on specially chosen irrational numbers[10]. It is similar to interleaved gradient noise but is simpler to compute and possibly more effective as a dither, particularly when augmented with a triangle wave function as demonstrated:，更多细节参见safew官方下载
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Performance: Supporting thousands of concurrent players was hard
Best for top weekend games。关于这个话题，旺商聊官方下载提供了深入分析