scala/scala — pull request #3364 by retronym (2014-01-14 15:53:04+00:00)
Title: [nomaster] SI-8152 Backport variance validator performance fix

% time qbin/scalac test/files/pos/t8146-performance.scala

real	0m2.015s
user	0m2.892s
sys	0m0.215s

% time scalac-hash v2.10.3 test/files/pos/t8146-performance.scala

real	1m13.652s
user	1m14.245s
sys	0m0.508s

Cherry-picks one hunk from 882f8e64.

Affects Slick, so I'm considering for 2.10.4. Review by @adriaanm