设计高效算法往往需要使用Hash链表，常数级的查找速度是任何别的算法无法比拟的，Hash链表的构造和冲突的不同实现方法对效率当然有一定的影响，然 而Hash函数是Hash链表最核心的部分，本文尝试分析一些经典软件中使用到的字符串Hash函数在执行效率、离散性、空间利用率等方面的性能问题。-The design of efficient algorithms often need to use the Hash list, find the speed of constant level is unmatched by any other method of, Hash chain structure and conflict to the efficiency of different methods to achieve a certain degree of impact of course, but function is Hash list Hash part of the core, this article attempts to analyze some software to use the classic string of efficiency in the implementation of Hash function, discrete, and space utilization of the performance issues and so on.