asepdanis / fgradle

Improving Gradle build time in a default Flutter project.

fgradle

Improving Gradle build time in a default Flutter project.

Step 1

Change default minSdkVersion at file android/app/build.gradle from 16 to 21

Step 2

Change default Gradle properties at file android/gradle.properties.
The value of 4096 will depends on your RAM. You can change to 3096 or 2048 for lower RAM.
The value 512m also depends on your RAM. You can change to 1024m if you have enough RAM to spare.

Here is the copy paste version:

#Enable daemon
org.gradle.daemon=true

# Try and findout the best heap size for your project build.
org.gradle.jvmargs=-Xmx4096m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

# Modularise your project and enable parallel build
org.gradle.parallel=true

# Enable configure on demand.
org.gradle.configureondemand=true

android.useAndroidX=true
android.enableJetifier=true

Step 3

Change the default distributionUrl at file android/gradle/wrapper/gradle-wrapper.properties to the latest version.
You can check the latest gradle version at this link.

Your build will be a lot slower after you change distributionUrl to latest version, because it needs to download the latest gradle file. But it will be faster at your next build.

You also need to change gradle dependencies at file android/gradle.build to the latest Android Gradle Plugin version.
You can check the latest Android Gradle Plugin version here and here.

See current release.

Step 4

To easily monitor the process of gradle build and detect when it's stuck. Always use -v when you build from command line.

$ flutter run -v

$ flutter run --profile -v

$ flutter run --release -v

$ flutter build apk --split-per-abi -v