What is the problem?

Slow to build the app if the app is multi-dex (over 65K method). And the build time is taking more than 1mn.

What’s the solution?

We can configure to make build multi-dex faster. Your device just need to have Android Lollipop or up.

Configure gradle like below

android {
productFlavors {
// Define separate dev and prod product flavors.
dev {
// dev utilizes minSDKVersion = 21 to allow the Android gradle plugin
// to pre-dex each module and produce an APK that can be tested on
// Android Lollipop without time consuming dex merging processes.
minSdkVersion 21
}
prod {
// The actual minSdkVersion for the application.
minSdkVersion 14
}
}
...
buildTypes {
release {
runProguard true
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.pro'
}
}
}
dependencies {
compile 'com.android.support:multidex:1.0.0'
}

When building, select devDebug in Build variant

More detailed stuff from here: https://developer.android.com/studio/build/multidex.html