Would the battery usage be much worse ? I get that taking more CPU time and doing less efficient operations will be worse, but this peaks would generally happe

Would the battery usage be much worse ? I get that taking more CPU time and doing less efficient operations will be worse, but this peaks would generally happen when the user is actively interacting, which in the running time of an app is not a lot. I would think the large majority of what this could be used for has less interactions and moving parts than the usual app. Of course someone would implement Quake in JS, but otherwise your note taking app or other utility (even a chat app) won't be actively sucking battery constantly.