Siege is a regression test and benchmark utility. It can stress test a
single URL with a user defined number of simulated users, or it can read
many URLs into memory and stress them simultaneously. The program reports
the total number of hits recorded, bytes transferred, response time,
concurrency, and return status. Siege supports HTTP/1.0 and 1.1 protocols,
GET and POST directives, cookies, transaction logging, and basic
authentication. Its features are configurable on a per user basis. Since
3.0.0 it also supports FTP.