I've implemented collecting MetricKit data for my app. And I don't understand meaning of histogrammedApplicationResumeTime values from appLaunch metric. I explored data and found, that there are can be really huge values – around hours.
For example, let's see one data snapshot from real user:
It seems unbelievable, that resumeTime takes 10902720ms (1 hour).
We've also built a bar chart per percentiles and it looks crazy:
p85 – 1030ms | p95 – 1.52 million ms | p99 – 13.2 million ms (3.5 hours)
Documentation says:
A histogram of the different amounts of time taken to resume the app from the background.
For me it sounds like: time between moment, when user launch app, which is in background mode already, to the moment, when app comes to foreground stay.
But the real data shows that it isn't.
Can somebody describe what really means histogrammedApplicationResumeTime metric? Have somebody ideas, why such large values are presented in collected data?