Android gradle project builds very slowly

Question

We have changed our Android app project to use gradle, but have noticed it is building significantly slower.

Before with ANT:
6 sek / 50 sec (with clean)

After with gradle:
30 sek / 80 sec (with clean)

I have profiled the solution with:

gradle assembleDebug --profile

The main tasks in the resulting report was thies tasks: (in the build without clean)

:packageDebug   10.690s     
:processDebugResources  8.795s  
:compileDebugJava   7.644s  

I don't have any ideas about getting more details information about thies tasks.

Is this normal? How could this be improved?
I know the new build system is still in betas, but it seems like others are building much faster.

I have looked around without finding a solution I have tried several things including making sure gradle deamon is enabled with a gradle.properties file containing this:

org.gradle.daemon=true
org.gradle.jvmargs=-Xms128m -Xmx256m
org.gradle.parallel=true

build.gradle:

buildscript {
    repositories {
        mavenCentral()
        maven { url 'http://download.crashlytics.com/maven' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.7.+'
        classpath 'com.google.guava:guava:14.0.1'
        classpath 'com.crashlytics.tools.gradle:crashlytics-gradle:1.+'
        classpath 'me.tatarka:gradle-retrolambda:1.1.1'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.2'
    }
}

repositories {
    mavenCentral()
    maven { url 'http://download.crashlytics.com/maven' }
}

apply plugin: 'android'
apply plugin: 'crashlytics'
apply plugin: 'retrolambda'
apply plugin: 'android-apt'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile 'com.google.guava:guava:14.0.1'
    compile 'com.crashlytics.android:crashlytics:1.+'
    apt "org.androidannotations:androidannotations:3.0.1"
    compile "org.androidannotations:androidannotations-api:3.0.1"
}

apt {
    arguments {
        resourcePackageName "com.example"
        androidManifestFile variant.processResources.manifestFile
    }
}

android {
    packagingOptions { //Fix: http://stackoverflow.com/a/20675331/860488
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    compileSdkVersion 10
    buildToolsVersion "18.0.1"

    defaultConfig {
        minSdkVersion 7
        targetSdkVersion 10
        buildConfigField "boolean", "useProductionServices", "true"
    }

    buildTypes {
        testflight.initWith(buildTypes.debug)
        debug {
            packageNameSuffix ".debug"
            buildConfigField "boolean", "useProductionServices", "false"
        }

        testflight {
            packageNameSuffix ".testflight"
            buildConfigField "boolean", "useProductionServices", "true"
        }

        release {
            buildConfigField "boolean", "useProductionServices", "true"
        }
    }
}

retrolambda {
    compile "net.orfjackal.retrolambda:retrolambda:1.1.2"
    jdk System.getenv("JAVA8_HOME")
}

Answer 1

I have same issue and solved by this setting :

File -> Settings -> Build, Execution, Deployment -> Build Tools -> Gradle -> Offline work

after this setting reduce time by 3 minute to 2s728ms