Blackberry Launcher may be causing battery drain

Hey guys, I'm not sure if this has been mentioned, but after a quick search through the forums I haven't seen anything.

On my htc one m8, I used to use the Google now launcher. Since I upgraded to a Priv, I had been using the BlackBerry launcher exclusively until last week. I don't know if it's a coincidence, but I have noticed a significant improvement in my battery since then. I'm curious to know if anyone else has experienced this with similar results.

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I switched to Nova and have not noticed any difference.