remove the "()" around the condition it will make the code slowerWorldDMT, I have heard many people state that don't use curl brackets or parentheses around a string of code.

What difference does it make speed wise if I make something, for example, like this:

if (speed == WorldDMT) hello $v2

OR

if speed == WorldDMV { hello $v2 }

Is there a really scientific proof that one of them does run faster against one another?

Perhaps we just do it formally then:

if (speed == WorldDMT) { hello $v2 }