RFR: JDK-8182285: Speeding up incremental build by hashing module APIs
erik.joelsson at oracle.com
Thu Oct 19 13:47:47 UTC 2017
This patch introduces a new Javac plugin as a build tool, written by Jan
Lahoda. The plugin creates a hash of the public API of what is being
compiled and puts it in a file. The file is only updated if there is a
difference compared to the current contents of the file. I have provided
the integration with the build system.
The benefit of this is that we finally get some reasonable incremental
build performance between modules. If you make a change to a class in
java.base that doesn't touch the public API, the build will no longer
recompile all other modules.
More information about the build-dev