2.5Ghz Dual G5
OSX 10.3.9
Values are in millions of operations per second, so larger values are better.

localAccesses

Io 27.0

Python 23.3

Ruby 8.1

localSets

Io 10.3

Python 23.2

Ruby 5.7

slotAccesses

Io 11.1

Python 6.1

Ruby 3.4

slotSets

Io 5.9

Python 5.9

Ruby 4.4

blockActivations

Io 3.7

Python 1.6

Ruby 2.2

instantiations

Io 2.5

Python 1.4

Ruby 1.4

versions

Io 20050725
Python 2.3.0 final 0
Ruby 1.6.8