React native run android terribly slow

[1nfinite]

I have a decent working laptop here. But the build speed seems to be intolerable to me.
It takes me around 3 minutes for a debug mode build in android and 7 minutes for release mode build in android for my application. Was it a matter related to certain release of react-native or nodejs? Or what exactly causes the slow build?

The app does not have hermes/proguard enabled. It's the similar timing despite i build on simulator/real device.

At least it doesn't seem "OK" for me. 3 minutes compilation is already long and 7 minutes compilation is very ridiculous to me.

Note: Mind to share what build time u all use as well?

1) npx react-native run-android (takes 3 minutes)
2) npx react-native run-android --variant=release (takes 7 minutes)

React Native version:
System:
OS: Windows 10 10.0.18363
CPU: (8) x64 Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
Memory: 15.41 GB / 31.88 GB
Binaries:
Node: 12.9.1 - C:\Program Files\nodejs\node.EXE
Yarn: 1.21.1 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 6.10.2 - C:\Program Files\nodejs\npm.CMD
IDEs:
Android Studio: Version 3.5.0.0 AI-191.8026.42.35.6010548
npmPackages:
react: 16.9.0 => 16.9.0
react-native: 0.61.5 => 0.61.5

Steps To Reproduce

1. npx react-native run-android (takes 3 minutes)
2. npx react-native run-android --variant=release (takes 7 minutes)

Describe what you expected to happen:

• Expect to takes around 1-2 minutes at most

[gromanas]

On a Mac pro and for our project it takes almost 10 min for a release build on android with react 0.61.4 and on debug it takes only 1min and 30 sec

[gromanas]

I have found this issue #27057 saying that if you add in build.gradle hermesFlagsRelease: [], the time will be significantly reduced. I have tried and the time now for a release build is reduced to 2 mins. Also if you flag enableHermes: in build.gradle as false again the time has been reduced to 3 mins. I saw also that the size of the .apk has began about ~10 MB higher if you use one of those two workarounds.

[samgermain]

@gromanas What block does this go in inside build.gradle, and I'm guessing you mean android/build.gradle?

[steinathan]

am having this issue, npx react-native run-android --verbose --no-jetifier takes a tremendous amount of time to compile and expo start is fucking up with mixed port (can't use it either) :(

[nikhil026]

@gromanas What block does this go in inside build.gradle, and I'm guessing you mean android/build.gradle?

You have to do changes in android/app/build.gradle, By default, the configuration is already present in the former file as a comment. You can check the docs here to make changes: https://reactnative.dev/docs/hermes

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[Piyush132000]

<============-> 99% EXECUTING [27m 16s]

Transforming artifact jsr305-3.0.2.jar (com.google.code.findbugs:jsr305:3.0.2) with JetifyTransform
Transforming artifact lifecycle-livedata-2.0.0.aar (androidx.lifecycle:lifecycle-livedata:2.0.0) with JetifyTransform
Transforming artifact appcompat-resources-1.1.0.aar (androidx.appcompat:appcompat-resources:1.1.0) with AarToClassTran
Transforming artifact vectordrawable-animated-1.1.0.aar (androidx.vectordrawable:vectordrawable-animated:1.1.0) with A
Transforming artifact fragment-1.1.0.aar (androidx.fragment:fragment:1.1.0) with AarToClassTransform
Transforming artifact viewpager-1.0.0.aar (androidx.viewpager:viewpager:1.0.0) with JetifyTransform
PS C:\Users\nites\MyApp> npx react-native run-android
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 967 file(s) to forward-jetify. Using 8 workers...
info JS server already running.
info Installing the app...

Task :app:stripDebugDebugSymbols UP-TO-DATE
Compatible side by side NDK version was not found.
<============-> 99% EXECUTING [10m 17s]
IDLE
IDLE
IDLE
:app:installDebug
IDLE
IDLE
IDLE
IDLE

see this its take too long time and there is no answer please help me

[ollirytkonen]

<============-> 99% EXECUTING [27m 16s]

Transforming artifact jsr305-3.0.2.jar (com.google.code.findbugs:jsr305:3.0.2) with JetifyTransform
Transforming artifact lifecycle-livedata-2.0.0.aar (androidx.lifecycle:lifecycle-livedata:2.0.0) with JetifyTransform
Transforming artifact appcompat-resources-1.1.0.aar (androidx.appcompat:appcompat-resources:1.1.0) with AarToClassTran
Transforming artifact vectordrawable-animated-1.1.0.aar (androidx.vectordrawable:vectordrawable-animated:1.1.0) with A
Transforming artifact fragment-1.1.0.aar (androidx.fragment:fragment:1.1.0) with AarToClassTransform
Transforming artifact viewpager-1.0.0.aar (androidx.viewpager:viewpager:1.0.0) with JetifyTransform
PS C:\Users\nites\MyApp> npx react-native run-android
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 967 file(s) to forward-jetify. Using 8 workers...
info JS server already running.
info Installing the app...

Task :app:stripDebugDebugSymbols UP-TO-DATE
Compatible side by side NDK version was not found.
<============-> 99% EXECUTING [10m 17s]
IDLE
IDLE
IDLE
:app:installDebug
IDLE
IDLE
IDLE
IDLE

see this its take too long time and there is no answer please help me

I think its normal for the first time you build your app that it takes some time. Mine takes 10-20 minutes at the first build.