IntelliJ Kotlin multiplatform project Gradle sync very long - gradle

Question

I've created a new Kotlin Multiplatform project for Andrid and iOS (Mobile shared Library). The project works fine but every time I run Gradle sync, it takes more than 5 minutes every time. It always get stuck on the same line:
Gradle: Build model 'org.jetbrains.kotlin.gradle.KotlinMPPGradleModel' for root project 'MyProject'
Why is it taking so long evey time?
I'm using Gradle version 5.1.
Here is my build.gradle file:
buildscript {
ext.kotlin_version = '1.3.11'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.0'
classpath "org.jfrog.buildinfo:build-info-extractor-gradle:4.8.1"
}
}
plugins {
id 'kotlin-multiplatform' version '1.3.11'
}
repositories {
google()
jcenter()
mavenCentral()
maven { url 'https://jitpack.io' }
}
repositories {
mavenCentral()
}
group 'com.example'
version '0.0.1'
apply plugin: "com.android.library"
apply plugin: "com.jfrog.artifactory"
apply plugin: 'maven-publish'
android {
compileSdkVersion 28
defaultConfig {
minSdkVersion 21
targetSdkVersion 28
versionCode 1
versionName version
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
compileOptions.incremental = false
}
kotlin {
targets {
fromPreset(presets.android, 'android')
// This preset is for iPhone emulator
// Switch here to presets.iosArm64 to build library for iPhone device
fromPreset(presets.iosX64, 'ios') {
compilations.main.outputKinds('FRAMEWORK')
}
}
sourceSets {
commonMain {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-stdlib-common'
}
}
commonTest {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-test-common'
implementation 'org.jetbrains.kotlin:kotlin-test-annotations-common'
}
}
androidMain {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-stdlib'
}
}
androidTest {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-test'
implementation 'org.jetbrains.kotlin:kotlin-test-junit'
}
}
iosMain {
}
iosTest {
}
}
}
configurations {
compileClasspath
}
Screenshot of the problem:

Answer 1

There's a known issue where Kotlin/Native dependencies are re-fetched every sync, which may be what you're seeing. You can see details and follow it here.
As posted to that issue, there's a workaround you may be able to try which essentially involves adding { content { excludeGroup("Kotlin/Native" } } to every item in your repositories block.

Answer 2

As #Brucelet pointed out this is a known issue. To supplement his answer, here is a full implementation of the workaround in Groovy:
repositories {
mavenCentral().content() {
excludeGroup "Kotlin/Native"
}
google().content() {
excludeGroup "Kotlin/Native"
}
jcenter() {
content {
excludeGroup("Kotlin/Native")
}
}
maven {
url 'https://jitpack.io'
content {
excludeGroup("Kotlin/Native")
}
}
}
and in Kotlin DSL:
repositories {
mavenLocal().apply {
content {
excludeGroup("Kotlin/Native")
}
}
maven {
url = uri("https://dl.bintray.com/soywiz/soywiz")
content {
includeGroup("com.soywiz")
excludeGroup("Kotlin/Native")
}
}
jcenter() {
content {
excludeGroup("Kotlin/Native")
}
}
google().apply {
content {
excludeGroup("Kotlin/Native")
}
}
}

Answer 3

Try to run the Gradle task from command lines with --parallel option.
Otherwise, fllow this guide to profile Gradle execution https://guides.gradle.org/performance/