Hi everyone, I'm experiencing significantly long ...

# multiplatform

[Mohammed Alramlawi]

Hi everyone,

I'm experiencing significantly long build times with my KMM project. While building a native Android project typically takes 10-30 seconds, building the KMM project can take up to 10 minutes. I'm looking for ways to speed up this process.

Here are the details of my current setup:
• Gradle version: 8.7
• agp : 8.2.2
• Kotlin version: 2.0.0
• JavaVersion.VERSION_11
I've already tried the following optimizations:
• Enabled the Gradle Daemon.
• Enabled parallel project execution.
• Configured incremental compilation for Kotlin.
• Using Gradle build cache.
Does anyone have any additional suggestions or best practices for reducing build times in KMM projects? Any configurations, tools, or techniques that have worked for you would be greatly appreciated!

Thank you!

[Bruno Medeiros]

what targets do you have on your KMP modules?

[ephemient]

Gradle configuration cache enables parallel execution of tasks within a project

[ephemient]

improving native compilation speed is on the roadmap, https://youtrack.jetbrains.com/issue/KT-42294/Improve-Kotlin-Native-compilation-time

[Mohammed Alramlawi]

@Bruno Medeiros

kotlin {
    androidTarget {
        @OptIn(ExperimentalKotlinGradlePluginApi::class)
        compilerOptions {
            jvmTarget.set(JvmTarget.JVM_11)
        }
    }

    listOf(
        iosX64(),
        iosArm64(),
        iosSimulatorArm64()
    ).forEach { iosTarget ->
        iosTarget.binaries.framework {
            baseName = "ComposeApp"
            isStatic = true
        }
    }

    sourceSets {
        androidMain.dependencies {
            implementation(libs.androidx.compose.ui.tooling.preview)
            implementation(libs.androidx.activity.compose)
            implementation(libs.ktor.client.okhttp)
        }
        iosMain.dependencies {
            implementation(libs.ktor.client.darwin)
        }
        commonMain.dependencies {
            implementation(compose.runtime)
            implementation(compose.foundation)
            implementation(compose.material)
            implementation(compose.ui)
            implementation(compose.components.resources)
            implementation(compose.components.uiToolingPreview)

            implementation(libs.ktor.client.core)
            implementation(libs.ktor.client.content.negotiation)
            implementation(libs.ktor.serialization.kotlinx.json)

            implementation(libs.kamel)
            implementation(libs.koin.core)
            implementation(libs.voyager.navigator)
            implementation(libs.voyager.koin)
        }
    }
}

[ephemient]

yeah native compilation and especially linking is currently much slower

[Mohammed Alramlawi]

@ephemient So, at this stage, it's typical for the build to take that long time. Right?

[Luca]

https://kotlinlang.org/docs/native-improving-compilation-time.html

[Luca]

kotlin.incremental.native=true
Would probably help a bunch for native builds after the first build

[Mohammed Alramlawi]

Thank you @Luca. I also realized that I shouldn't build the project every time. It's interesting.

[Luca]

still experimental so might cause strange issues but you can always toggle it