These are just examples, but I'm wondering, which one is the fastest and best to use? I'm sure if there is a difference it's so insignificant it won't make much of a difference but I'd like to know nonetheless.

1.
Code:
    if ($1 == test) { msg # test }


2.
Code:
    if ($1 == test) msg # test


3. (someone mentioned this to me but it doesn't seem like the best programming etiquette
Code:
    if $1 == test { msg # test }


4. Or just no () {} at all?

Thanks.