Want to swing faster? That is, want more clubhead speed? The easy way?
Relax more. And more than that.
Relax the parts of your body that swing the club–your shoulders, arms, and hands. Especially the shoulders.
This swing won’t feel powerful, but power is not what you’re looking for. Clubhead speed is, and you get it by taking tension out of your body.
Be careful, though, because you might get more clubhead speed than you can handle.
Your maximum tempo is the fastest you can swing and still hit the ball on the center of the clubface.
You can swing faster than that, but that’s exceeding your swing’s red line, and the extra speed won’t do you any good because you can’t control it.
Ignore all the things you see on YouTube about adding swing speed through technical fixes.
Just relax. That’s all there is to it.