APP very caton when use 4G.

[CocoaZX]

APP very caton when use 4G.
Like navigation push animation will take more 10 seconds.
But it's ok when use wifi.

React Native version:

React Native Environment Info:
System:
OS: macOS High Sierra 10.13.6
CPU: (8) x64 Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
Memory: 27.61 MB / 16.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 11.11.0 - /usr/local/bin/node
Yarn: 1.13.0 - /usr/local/bin/yarn
npm: 6.7.0 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
Android SDK:
API Levels: 23, 26, 27, 28
Build Tools: 25.0.0, 25.0.2, 25.0.3, 28.0.3
System Images: android-Q | Google APIs Intel x86 Atom
IDEs:
Android Studio: 3.4 AI-183.5429.30.34.5452501
Xcode: 10.1/10B61 - /usr/bin/xcodebuild
npmPackages:
react: 16.8.3 => 16.8.3
react-native: 0.59.3 => 0.59.3
npmGlobalPackages:
react-native-cli: 2.0.1
react-native-git-upgrade: 0.2.7

Steps To Reproduce

Look like all animation thread block.

[turnrye]

Hey @CocoaZX, this is unlikely to be a bug in React Native. Without a lot more detail, it's hard to help here. Please consider adding more details or closing this issue.

[CocoaZX]

Well...that's strange. Because every animation is very caton . like view A navigation push view B will take so long , seem like view B network data ahead of time(in componentDidMount) .But when I use debugger to see the sequence of them , they are in normal sequence .
Dose anyone have this problem before?

[CocoaZX]

And it's just happen in Android&4G,iOS is good

[kelset]

Hello there 👋 this issue doesn't have a repro (which means, a react-native init-ed project with the minimal changes that leads to creating the same issue you are reporting). Unfortunately, I have no way of helping you in a meaningful way – there is no easy way for me to recreate the situation and check that the issue reported is still there when changing the code.

That said, this seems to suggest that you do some fetches that are blocking the JS thread when loading the components (maybe you have the server interaction in the constructor?), I suggest you try to debug that.

Because of this, we are going to close this issue - but if a repro is shared, we are happy to reopen it 🤗

[CocoaZX]

We use react-navigation to do the navigation.Can you try it ?

[CocoaZX]

Found this , I connect a Intranet IP with synchronous

[yoyo0427]

@CocoaZX

How did you solve this problem?

[CocoaZX]

Yeah,It's my problem