I have an energy-saving app called Endurance (via Setapp) on my MacBook Pro, it’s set to activate when power drops to 70%. Then various things happen, such as Turbo Boost being turned off. When the power is reconnected you can continue with Endurance active or off again to restore full power.
I let Geekbench 5 loose on it with Endurance off & with it on, the results were quite significant.
At one stage of the Geekbench testing I’d used the app for three minutes. When I powered up again & turned the app off, it reported that I’d saved eight minutes of battery.