Just posting here because I thought it was curious. I was finally able to enable compose in my existing project. I didn't write any compose code at all. Just turned on compose in my build.gradle and added an impl dep on compose runtime.
Apk size increase 0.3MB
after adding impl compose runtime, ui, ui tooling, foundation, material
Apk size increase 1.8MB
This is without proguard. but thought it was interesting to see what the general hit was.