What's the difference between the "cucumber" command and the "rake cucumber" command?

开发者_如何学编程What's the difference between the "cucumber" command and the "rake cucumber" command?

Is there some preference as to which should be used? I think I heard calling "rake" is slightly slower...

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I believe the rake cucumber command first runs rake db:test:prepare, whereas just running cucumber does not (in which case you may get some unexpected results).