1 ## 8.1\. User Experience Consistency 2 3 A smooth user interface can be provided to the end user if there are certain 4 minimum requirements to ensure a consistent frame rate and response times for 5 applications and games. Device implementations, depending on the device type, 6 MAY have measurable requirements for the user interface latency and task 7 switching as described in [section 2](#2_device-types). 8 9 * [H-0-1] **Consistent frame latency**. Inconsistent frame latency or a 10 delay to render frames MUST NOT happen more often than 5 frames in a second, 11 and SHOULD be below 1 frames in a second. 12 * [H-0-2] **User interface latency**. Device implementations MUST ensure 13 low latency user experience by scrolling a list of 10K list entries as defined 14 by the Android Compatibility Test Suite (CTS) in less than 36 secs. 15 * [H-0-3] **Task switching**. When multiple applications have been 16 launched, re-launching an already-running application after it has been 17 launched MUST take less than 1 second. 18 * [T-0-1] **Consistent frame latency**. Inconsistent frame latency or a 19 delay to render frames MUST NOT happen more often than 5 frames in a second, 20 and SHOULD be below 1 frames in a second. 21
