Apple may reduce the performance of the 3nm A17 Pro processor due to massive overheating of the iPhone 15 Pro::The problem of overheating of iPhone 15 Pro and Pro Max smartphones is becoming widespread. It is possible that Apple will be forced to take the unpopular step of reducing the performance of the latest 3nm A17 Pro chip.
“Yeah this update is going to make your phones slower” is not something any smartphone producer would ever say. The difference might be negligible, but less power = less performance.
They say it is an OS bug and some app problems that are causing the overheating. If true that might help the performance if anything.
https://www.macrumors.com/2023/09/30/apple-iphone-15-pro-overheating-details/
That’s the general tradeoff but not how it always works.
A car generally trades power for fuel consumption but things like tires being properly inflated can help with both. In the same way, sometimes inefficient software leads to both reduced performance and higher power consumption, because too much power is being directed towards unproductive use.