A build cache allows Gradle to reuse task output from any previous invocation, including those from other machines. Kotlin 1.2.21 allows Kotlin projects to make use of build caching.

Gradle Blog

Kotlin 1.2.20+ enables Gradle build cache support for Kotlin projects, allowing compiled classes and other task outputs to be reused across builds and machines. The post walks through enabling the build cache via command-line flag or gradle.properties, demonstrates a ~5x speedup using the Spek project as an example, covers IntelliJ IDE delegation setup, and explains how to opt-in kapt annotation processing tasks into caching since they are disabled by default.

Using Gradle build cache with Kotlin

Enabling the build cache for your projects #