siege.js

install

npm install siege --save

http benchmark

siege()
  .on(3000)
  .for(10000).times
  .get('/')
  .attack()

save as benchmark.js and run

node benchmark.js

Use siege start/stop service

siege(cmd) can start service before benchmark, stop service after benchmark, for agile development.

siege('node /path/to/app.js')
  .on(3000)
  .get('/')
  .attack()

You can also use siege('/path/to/app.js') to benchmark http handler of nodejs, require('app.js') must return a function(req, res).

siege(__dirname + '/app.js')
  .on(3000)
  .get('/')
  .attack()

Code above will start server listen at port 3000, benchmark module will connect to 3000. You can ignore .on(3000), default is .on('/tmp/siege.sock')

Server maybe need a little while to prepare, use .wait(ms) let benchmark wait a moment to do benchmark.

siege(__dirname + '/app.js')
  .wait(1000)
  .get('/')
  .attack()

Define task

Use method(url, params) to define task, you can define multiple tasks, this will help you figure out which page is slow on your site.

siege()
  .get('/')
  .post('/hello', {hello: 'world'})
  .attack()

Tasks will execute as define order one by one.

Repeat times and duration

Use .for(n).times define repeate times, use for(n).seconds define duration, you can use on siege for all tasks, or use it on single task.

siege()
  .for(10000).times
  .get('/').for(2).seconds
  .get('/about').for(3000).times
  .get('/contact')
  .attack()

Code above, / will do benchmark for 2 seconds, /about will do for 3000 times, /contact will do for 10000 times.

Concurrent

Use .concurrent(n) to control concurrent request. default is 15

siege()
  .concurrent(100)
  .get('/')
  .attack()

Cookie

Use .withCookie to enable cookie jar, so you can do benchmark on the page require login.

siege()
  .withCookie
  .post('/login', {user: pass}).for(1).times
  .get('/')
  .attack()

Start siege attack

Use .attack() to start siege attack.

Multiple app

In theory Siege can do benchmark on multiple app.

siege('app1.js')
  .get('/')
  .attack()
  
siege('app2.js')
  .get('/')
  .attack()

But under unknow reason, after first app done, seconde app will quit. You have two options,

1. Don't use this feature
2. send a pull request

More feature and report?

Siege will add new feature base on requirement, we have with304 options, but it is not implement.

Siege also want more beautiful report.

It's welcome to send a pull request.