用产品经理的心态对待咖啡，不断迭代好喝的咖啡。公众号：咖啡平方
SourceBuffer: appendBuffer() method — MDN Web Docs，更多细节参见搜狗输入法2026
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Randomly selecting border points or using simple geometric divisions (squares/hexagons) results in too many border points per cluster (50-80). This leads to a shortcut explosion (N*(N-1)/2 shortcuts), making the files large and and calculations slow.
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