How Fast Does Java Compile? (mill-build.org)

Why is it

./mill common.compile

and

./mill clean common

but not

./mill common.clean

?

Very interesting. Have you already investigated where is Mill's overhead spent? What can be optimized in Mill to get its time closer to just invoking the javac? Do you already have a plan?

Excellent example where CRaC [Coordinated Restore at Checkpoint, %] would be useful.

[%] https://wiki.openjdk.org/display/crac