How to find the cause of a 100% CPU usage on an iPhone App

Question

I've diagnosed a strange behavior in an app : after 10 minutes or so, the CPU usage goes to 100%. There's no leak in the app, and it happens while the app is doing nothing.

I can profile this with instruments using the "Time Profiler", but is there a way to find what the actual cause is ?

I reproduced the bug on the simulator, but apparently it also happens on device. — Julien, Sep 12 '11 at 13:49
When profiling with Instruments (Time Profiler), look to see what method is using the majority of CPU time. Trace the calls back to see why. — Alastair Stuart, Sep 12 '11 at 14:00

score 41 · Accepted Answer · answered Sep 13 '11 at 10:59

41

When profiling with Instruments (Time Profiler), look to see what method is using the majority of CPU time. Trace the calls back to see why.

answered Sep 13 '11 at 10:59

Alastair Stuart

4,165
3
36
33

Your response help me for all my applications. TKVM Stuart – Masterfego Jan 08 '17 at 03:52

How to find the cause of a 100% CPU usage on an iPhone App

1 Answers1

Linked