Expo crashes due to exceeding 80% CPU usage over 180s (iPhone 6s)

#1

Hi,
I’m developing an app on my iPhone 6s and this occurs quite often, causing me have to restart expo.
While running the expo app, my iPhone is stuck at 100% CPU usage.

Is there any way I can fix this?

The performance Monitor shows the following:
RAM: 300MB
JSC: 0MB
Views: 2023 / 2571
UI: 60FPS
JS: 60FPS

Although I had to use a separate app to monitor CPU usage.

The following crash log was retrieved from the device using iTools

{"app_name":"Exponent","timestamp":"2019-02-13 18:59:23.90 +0700","app_version":"2.10.0","slice_uuid":"598D83C8-992B-3AE7-8814-A3574846CEF4","adam_id":982107779,"build_version":"2.10.0.105122","bundleID":"host.exp.Exponent","share_with_app_devs":false,"is_first_party":false,"bug_type":"202","os_version":"iPhone OS 12.1.2 (16C101)","incident_id":"62899C18-6914-43D3-BDAF-CE1D8D6404B1","name":"Exponent"}
Date/Time:       2019-02-13 18:59:12 +0700
End time:        2019-02-13 18:59:23 +0700
OS Version:      iPhone OS 12.1.2 (Build 16C101)
Architecture:    arm64
Report Version:  27
Incident Identifier: 62899C18-6914-43D3-BDAF-CE1D8D6404B1

Data Source:     Microstackshots
Shared Cache:    0x33234000 0B77AC64-FAFD-3703-A400-716AB8683FEB

Command:         Exponent
Path:            /private/var/containers/Bundle/Application/D95ADA48-2690-44BA-9787-CD123304935C/Exponent.app/Exponent
Identifier:      host.exp.Exponent
Version:         2.10.0 (2.10.0.105122)
Beta Identifier: FA53A267-3F1A-49E0-966E-F5E782A49BB6
PID:             11597

Event:           cpu usage
Action taken:    none
CPU:             144 seconds cpu time over 158 seconds (91% cpu average), exceeding limit of 80% cpu over 180 seconds
CPU limit:       144s
Limit duration:  180s
CPU used:        144s
Duration:        11.07s
Steps:           12

Hardware model:  iPhone8,1
Active cpus:     2
Boot args:        

Thanks,
rolznz

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#2

Mine gets stuck while I am using gifted chat for a while. The phone android or iphone get heated and will no longer response on activities. RAM 200MB, JSC 0.00 MB, Views 261 / 737, UI 60, JS 0. Any idea?

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closed #3

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