Tools for analyzing the performance of web sites.
Rails Analyzer Tools contains Bench, a simple web page benchmarker, Crawler, a tool for beating up on web sites, RailsStat, a tool for monitoring Rails web sites, and IOTail, a tail(1) method for Ruby IOs.
http://seattlerb.rubyforge.org/rails_analyzer_tools
Bug reports:
http://rubyforge.org/tracker/?func=add&group_id=1513&atid=5921
Bench lets you benchmark the performance of a particular page. Simply give the URL, the number of requests to run and the number of threads to run in parallel.
You really, really, really don't want to run bench against a live website.
$ bench -u http://coop.robotcoop.com/ -r 50 -c 2
50....45....40....35....30....25....20....15....10....5....
Total time: 10.7073893547058
Average time: 0.214147787094116
Crawler lets you exercise a server by crawling it really fast. It picks URLs at random from the returned page and always stays on the same host. When you kill it with a ^C it prints out a summary.
You really, really, really don't want to run crawl against a live website.
$ crawl -u http://coop.robotcoop.com/ -c 2
>>> http://coop.robotcoop.com/
GET / HTTP/1.0
Host: coop.robotcoop.com
User-Agent: RubyCrawl
...
^C
Total time: 0.355171680450439
Requests: 3
Average time: 0.118390560150146
RailsStat displays the approximate number of requests, queries, and lines logged per second in 10 (or whatever) second intervals. Simply give it the path to your production log for a live Rails site and you're done:
$ rails_stat /var/log/production.log
~ 2.1 req/sec, 23.0 queries/sec, 32.8 lines/sec
IOTail tails a file like the tail system utility. This lets you collect data from a live log file.