From benchmarks to real apps: Exploring the energy impacts of performance-directed changes

We conducted an empirical study to investigate the energy impacts of applying four commonly suggested performance tips to eight real Android applications. Considered performance tips are unlikely to impact energy usage in a statistically significant manner and, even when the impacts are statistically significant, the change in battery life is around 1%. Mobile application developers cannot expect to improve the energy usage of their applications as a by product of performance improvements. Tools and techniques that specifically target energy usage are necessary for significant improvements.