Rather, it uses a combination of JavaScript and a server application called Librarian, which collects waiting-time data from clients. Furthermore, the technique tracks the waiting time of actual clients, instead of sample clients distributed across the Internet, so that Website managers know exactly what their users are experiencing as opposed to having to extrapolate from a sample. This can justify buying or not buying faster hardware or content distribution services like Akamai or Digital Island. It could also lead to a new class of service-level agreements.
Most Internet users have a boredom threshold of about four seconds.
If a page takes longer than that to load, they are likely to search for an alternative Website to obtain their information. As people become used to new networking technologies, that boredom threshold will likely drop to only two seconds or less. The server's access time can be boosted with more horsepower, whereas the client's rate of accessibility is subject to the available hardware. The network is perhaps the least-controllable element, although companies can improve CPRT by such means as utilizing caching servers. For example, if everyone in the .sg domain in Sinagpore is getting a slow response time, a Website manager might consider adding a caching server there.