$node benchmark
Run DOM benchmarks.

Options:
  --impl, -i  which DOM implementation to use [jsdom|domino|domjs]
  --num, -n   how often to run each test
  --grep, -g  only run tests matching this pattern
  --debug     output the result of the first test run
  --help, -?  display this help message

$node benchmark -i jsdom
Node v0.5.10: Running each test 1500 time(s) backed by jsdom.
append: 875ms
empty: 559ms
parse: 2710ms
serialize: 62ms
weld: 10239ms
--------------
total: 14452ms

$node --harmony_proxies --harmony_weakmaps benchmark -i domjs
Node v0.5.10: Running each test 1500 time(s) backed by domjs.
append: 569ms
empty: 463ms
parse: 2161ms
serialize: 71ms
weld: 4947ms
--------------
total: 8223ms

$node benchmark -i domino
Node v0.5.10: Running each test 1500 time(s) backed by domino.
append: 160ms
empty: 108ms
parse: 1071ms
serialize: 19ms
weld: 2302ms
--------------
total: 3669ms