dexBuilder failed, and the build spent a huge amount of time in GC. I wouldn't expect this with 4GB heap and the Kotlin compiler daemon in a separate process.

Build scan

Heap dump

Another heap dump after GC.run

Build: AI-201.7846.76.42.6682321, 202007151459,

AI-201.7846.76.42.6682321, JRE 1.8.0_242-release-1644-b01x64 JetBrains s.r.o, OS Windows 10(amd64) v10.0 , screens 1920x1080

AS: 4.2 Canary 5; Kotlin plugin: 1.4-M3-release-Studio4.1-1; Android Gradle Plugin: 4.0.0; Gradle: 6.3; NDK: from local.properties: (not specified), latest from SDK: (not found); LLDB: pinned revision 3.1 not found, latest from SDK: (package not found); CMake: from local.properties: (not specified), latest from SDK: 3.10.2, from PATH: (not found)