+ - GHC is now officially Open Source, see the LICENSE file in the
+ distribution for details.
+
+ - Rewrite rules can be specified in the source using the RULES
+ pragma. This is used for automatic fusion of common list functions.
+
+ - Performance tuning: compiled programs now allocate 30% less
+ and run 20% faster on average compared to GHC 4.02.
+
+ - GHC now uses a Happy parser instead of the old yacc/lex one.
+
+For full details see the release notes:
+
+ http://research.microsoft.com/users/t-simonm/ghc/Docs/latest/users_guide/users_guide-1.html#ss1.4