解压速度

要提高文件检索系统的性能，需要对倒排文件压缩技术进行研究与对比，以使文件检索系统在最大压缩比和最快的解压速度间寻找均衡，以到达最大的吞吐量。

To improve the throughput of Information Retrieval System , we need to research into inverted file compression techniques , to get the statuesque point between best compression ratio and the fastest decompression time .

另一方面，gzip在压缩/解压时间方面拥有最佳性能，而PPM的压缩/解压速度慢很多。

On the other side , gzip has best performance in terms of compression / decompression time and while the compression / decompression time of PPM is much slower .

在解压阶段，本文对原有的词条形成方式进行了扩展，新词条能够在解压阶段减少查询字典的次数，从而提高解压速度。

In the decompression stage , the formation of the original term is extended . The new entries to the dictionary reducing the number of queries to improve decompression speed .