Too many java source files are recompiled when one changes.

Martin Buchholz martinrb at
Tue Mar 26 22:43:47 UTC 2013

If I modify an ordinary JDK source file (like, then all
files are recompiled, even those that don't have any compile-time
dependency on StringBuilder.

## Starting jdk
Compiling 9412 files for BUILD_JDK

I'd like to see instead

Compiling 103 files for BUILD_JDK

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