How to generate Compose Compiler Metrics?

Add the following lines to your root project's build.gradle file. This will direct the Compose compiler to generate metrics and save all of them into the root project's build folder (for all of the modules).

KotlinGroovy

build.gradle.kts (root)

allprojects {
    tasks.withType(org.jetbrains.kotlin.gradle.dsl.KotlinCompile::class.java).configureEach {
        kotlinOptions {
            // Trigger this with:
            // ./gradlew assembleRelease -PenableMultiModuleComposeReports=true --rerun-tasks
            if (project.findProperty("enableMultiModuleComposeReports") == "true") {
                freeCompilerArgs += listOf("-P", "plugin:androidx.compose.compiler.plugins.kotlin:reportsDestination=" + rootProject.buildDir.absolutePath + "/compose_metrics/")
                freeCompilerArgs += listOf("-P", "plugin:androidx.compose.compiler.plugins.kotlin:metricsDestination=" + rootProject.buildDir.absolutePath + "/compose_metrics/")
            }
        }
    }
}

build.gradle (root)

subprojects {
    tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
        kotlinOptions {
            // Trigger this with:
            // ./gradlew assembleRelease -PenableMultiModuleComposeReports=true --rerun-tasks
            if (project.findProperty("enableMultiModuleComposeReports") == "true") {
                freeCompilerArgs += ["-P", "plugin:androidx.compose.compiler.plugins.kotlin:reportsDestination=" + rootProject.buildDir.absolutePath + "/compose_metrics/"]
                freeCompilerArgs += ["-P", "plugin:androidx.compose.compiler.plugins.kotlin:metricsDestination=" + rootProject.buildDir.absolutePath + "/compose_metrics/"]
            }
        }
    }
}

With the above setup, you can generate Compose compiler metrics by executing the following command in the terminal window.

./gradlew assembleRelease -PenableMultiModuleComposeReports=true --rerun-tasks