/rxjsSample

Primary LanguageJava

Sample rxjs react-native

This application demonstrates memory leak in react native environment while using hermes and rxjs. The leak is reproduced on android (not tested in ios yet).

Build & run

yarn install yarn android

Code

This sample is a dummy loop to fetch a web site (lemonde.com is just a sample) and subscribe to the answer

 ajax({
      url: 'http://youBigRestApiCall.com/',
      method: 'GET',
    }).subscribe(
      () => {},
    );

Results

Each ajax call causes a memory leak. As seen in sample when hermes is enable the memory is not released. If you disable hermes by putting hermesEnabled=false in gradle.properties, the leak is no more seen.

track memory leak

There are 2 ways to track memory usage in the app: 1/ The easy one:

while [ 1 ] ; do adb shell dumpsys meminfo com.rxjssample | grep PSS && sleep 2 ; done

2/ Or use android studio memory profiler tool