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Debugging is slow on real android device without attached debugger

See original GitHub issue

React Native version: 0.59 (but also all others)

Steps To Reproduce

Use real device for testing
react-native run-android
see that app is very slow on the device

Describe what you expected to happen:

Same performance as with attached remote debugger or at least a command line option to react native cli that starts the app with debugger attached.

Workaround

adb shell input keyevent 82
press “DebugJS remotely”
see that app now performs much faster

Issue Analytics

State:
Created 4 years ago
Reactions:2
Comments:18 (4 by maintainers)

Top GitHub Comments

8reactions

IanOnFirecommented, Jul 19, 2019

I don’t think this is caused by hardware specs of the device, because even on high-end Android devices I experience really bad performance in debug builds.

Please do notice that this only concerns debug builds, we’re experiencing this after updating to react-native@0.60.3. After connecting a js debugger the expected performance will return. This problem will persist, regardless if we enable or disable the use of Hermes engine.

7reactions

emilioicaicommented, Jul 26, 2019

We are also seeing issue on RN 0.60.4 @dulmandakh, please consider re-opening as it affects all devices, no matter their specs