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(2)写性能:array 的写性能大约为 skiplist 的20倍

(3)读性能:由于内存拷贝及排序,内存中的点数越多,array查询的性能越差,在1000万点时,skiplist (3)读性能:由于内存拷贝及排序,内存中的点数越多,array查询的性能越差,在100万点时,skiplist 的查询性能约为array的5倍,100点时,skiplist 的查询性能约为array的1.5倍