To reduce build times in your Compose Multiplatform project, try these steps:

1. Enable the K2 Compiler: Add this to your gradle.properties file to enable Kotlin’s new compiler, which can improve build speed:

kotlin.experimental.tryK2=true

2. Optimize Gradle Settings:

Enable Gradle's configuration cache:

org.gradle.unsafe.configuration-cache=true

Enable parallel execution:

org.gradle.parallel=true

Enable incremental compilation:

kotlin.incremental=true

3. Update Android Gradle Plugin: If you're getting warnings, upgrade to the latest version of the Android Gradle plugin in your build.gradle file:

classpath 'com.android.tools.build:gradle:'

4. Fix Warnings: The build warnings you’re seeing might be slowing down the process. Try to resolve them, especially any related to deprecations or plugin issues.

5. Build for Specific iOS Targets: Instead of building for all iOS architectures (Arm64, X64, etc.) at once, build only for the one you're testing (e.g., just for the simulator).