Abstract: The potential relation between precision and recall which are two important factors in Web prefetching performance evaluation is researched. Theoretical derivation is conducted and some facts are that the relation between them can be in sequence and vice verse. The log of practical Web server and agent one is used to make performance test. Simulation experimental results show the recall depends on precision, and the increasing precision can be helpful to the improvement of recall.

Key words: Web prefetching, performance evaluation, precision, recall

摘要： 研究Web预取性能评价的2个重要指标(准确率与查全率)之间可能存在的关系，通过理论推导得出，两者的关系可以是相顺的，也可以是相逆的，采用真实Web服务器和代理服务器的日志进行性能实验。仿真实验结果表明，查全率依赖于准确率，即准确率的提高有利于查全率的提高。

关键词: Web预取, 性能评价, 准确率, 查全率

CLC Number: 

• TP393