If the proxy server prefetches, clients can share and recycle the result. Modification and reinstallation of programs are complex and annoying. No one wants to modify and reinstall clients and servers. It is difficult to replace clients with the prefetching mechanism. Like the caching proxy, the mechanism gets and stores referenced pages in the client's retrieved pages.
Clients can access the prefetching proxy by the same way as the caching proxy.
With the prefetching scheme on the proxy server, the result can be shared among clients. We have calculated hit rate as the measure of the scheme's performance, because it is difficult to calculate actual latency and the response time. When a request hits a cache, the proxy can reply immediately. As the hit rate increases, the mean retrieval time decreases. We collected references and calculated the hit rate using 8,519 clients requests in the log.