[Android] Very high memory usage. App becomes very laggy!

[kesha-antonov]

Hello! I have an app with not very complex UI. But with lots of code. And it takes a lot of memory in android. And becomes very laggy after few screens loaded. In iOS code works without any lag in dev/prod modes.

Is this a bug report?

Yes. In iOS same code works great whether is in dev mode or production mode.

Here's memory usage without remote debugger turned on:

Here's memory usage with remote debugger turned on (see memory usage reduced):

Even if I reduce views - memory usage is still high:

Have you read the Contributing Guidelines?

Yes.

Environment

Environment:
OS: macOS High Sierra 10.13
Node: 6.11.3
Yarn: Not Found
npm: 5.4.2
Watchman: 4.9.0
Xcode: Xcode 9.0 Build version 9A235
Android Studio: 2.3 AI-162.3871768

Packages: (wanted => installed)
react: ^16.0.0 => 16.0.0
react-native: github:facebook/react-native#60c898d8643daf80ef8175af7dc8411709eff379 => 1000.0.0

RN - 0.50-rc

Steps to Reproduce

1. git clone https://github.com/kesha-antonov/rn_memory_usage_test_high_usage
2. cd rn_memory_usage_test_high_usage
3. npm i
4. nano node_modules/react-native-sentry/android/build.gradle
5. Change sdk tools to

    compileSdkVersion 25
    buildToolsVersion '25.0.3'

6. Set your android ndk, sdk paths in androids/local.properties
7. react-native run-android
8. adb shell dumpsys meminfo com.rn_memory_usage_test_high_usage
9. See a lot of memory used (115 MB and above with just 21 (!!!) views, 125.5 MB with 126 useless views)

Expected Behavior

25-75 MB of memory usage will be fine I guess.
With no lags, no frame drops

Actual Behavior

A lot of memory used: 165-261 MB
Users experience good look of first screen and when they go through the app it becomes laggy

Reproducible Demo

https://github.com/kesha-antonov/rn_memory_usage_test_high_usage

[kesha-antonov]

[kesha-antonov]

Anybody?

@javache @ide @hramos

[kesha-antonov]

I even see growing memory in sample app #16600

[kesha-antonov]

Maybe related #16732

[lhfiii]

Resolved? How? @kesha-antonov

[kesha-antonov]

Unfortunately now. Still very high memory usage @lhfiii

[lhfiii]

@kesha-antonov It may be related with memory leak. Try to display a number of image with FlatList. Even close the activity does not help. Especially on android 4

[lhfiii]

I have replace fresco with glide and the leak still exists. It seems that the leak comes from other native module. I have found a lot of YogaNode in the FinalizeReference chain.

[gold-duo]

YogaNodePool.get().clear(); release reference.

[kesha-antonov]

Hello @droidwolf !
Where to put it?

[gold-duo]

activity onDestory

[pavanmehta91]

Could you guide where to put it? and where's Activity onDestory()?