Any point to disabling dock reflections on my Macbook 2009? Will I gain more performance or not really?

I know that for some odd reason when I shut the translucent bar off on my Macbook 2009 that for some odd reason my Macbooks cpu runs a lot cooler and when I play hd videos 720p vids that I don't hear my cpu fan starting up. The tranlucent bar was taking that much of my cpu or nvidia 9400m intergrated gpu performance up? I'm wondering if I can gain even more performance gain if I shut my dock reflections off. Would I gain even more performance or do you think that would be pointless to shut off the reflections on dock because it's probably not taking up too much performance? Also, I think the only way to shut reflections off in the dock would be through the terminal which is kind of odd that they don't give you a feature in system preferences to shut it off.

No change in peformance. Disabling is pointless.
For the reflection, you can make changes in System Preferences > Dock
(No need for Terminal)
Select or deselect whichever you want:   Show indicator lights for open applications

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