Energy impact isn't a percentage. It doesn't have any units. I understand that the author is trying to prove a point -- and those points are valid, but it's not

Energy impact isn't a percentage. It doesn't have any units. I understand that the author is trying to prove a point -- and those points are valid, but it's not that Slack is consuming 63% of your energy. It's an arbitrary measure. [0] > So, in conclusion, on 10.10 and 10.11, the formula used to compute “Energy Impact” is machine model-specific, and includes the following factors: CPU usage, wakeup frequency, quality of service class usage, and disk, GPU, and network activity. [0]: https://blog.mozilla.org/nnethercote/2015/08/26/what-does-the-os-x-activity-monitors-energy-impact-actually-measure/ https://blog.mozilla.org/nnethercote/2015/08/26/what-does-th...