1803860 - [Google Play Console warning] Slow warm start rate is particularly high on devices with CPU: ARM Cortex-A53

Status: NEW

(Firefox for Android :: Performance, defect, P2)

Description

[Chris Peterson [:cpeterson]]

Attachment: slow_warm_start_rate.png

The Google Play Console warns that:

Your slow warm start rate is particularly high on devices with CPU: ARM Cortex-A53

Your slow warm start rate on devices with CPU: ARM Cortex-A53 (24.34%) is significantly higher than your overall slow warm start rate (5.36%). These devices represent 18% of your total installs. Reduce slow warm starts on these devices to improve your overall slow warm start rate.

Google defines "slow warm start rate" as:

The percentage of daily sessions in which users experienced at least 1 warm startup time of more than 2 seconds. This is measured as the time taken from when a user launches your app, to when the first frames appear on the screen. A daily session refers to a day during which your app was used.

https://developer.android.com/topic/performance/vitals/launch-time#warm

Comment 1

[Marc Leclair [:mleclair]]

Mhm looking at the numbers, I initially thought "well the A53 is a very old processor" , in comparison, its worse than the processor used in the g5 (snapdragon 430). Looking into it though, I see that some phones have the a53 as a co-processor (so the slower unit might be the a53 that's there to supplement the CPU - an example would be the Sony Xperia z5). The Z5 is between the G5 and the A51 (its closer to the galaxy a50, actually). So here's my question: Does this include devices that have the Cortex A53 as a coprocessor? If so, that means those devices aren't using their faster cores to start up the app and I wonder why .