GrapheneOS – When an App Is Slow

The author of GrapheneOS, a security-focused Android fork, discusses the challenges of detecting and optimizing application performance issues. GrapheneOS has a performance-related feature called 'App Is Slow', which is activated when an app is running slowly. This feature is triggered when an app has been running for more than 30 seconds and is consuming more than 20% of the device's CPU. The author explains that this threshold was chosen to balance between false positives and false negatives. The author also notes that the 'App Is Slow' feature is not a hard kill switch and can be disabled by the user. The author hopes that this feature will help developers identify performance bottlenecks in their apps and improve the overall user experience.