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+Fri Oct 11 20:35:59 2013 Koichi Sasada <ko1@atdot.net>
+
+ * gc.c, parse.y: support generational Symbol relatetd marking.
+ Each symbols has String objects respectively to represent
+ Symbols.
+ These objects are marked only when:
+ * full marking
+ * new symbols are added
+ This hack reduce symbols (related strings) marking time.
+ For example, on my Linux environment, the following code
+ "20_000_000.times{''}"
+ with 40k symbols (similar symbol number on Rails 3.2.14 app,
+ @jugyo tells me) boosts, from 7.3sec to 4.2sec.
+
+` * internal.h: change prototype of rb_gc_mark_symbols().
+
Fri Oct 11 19:27:22 2013 Akinori MUSHA <knu@iDaemons.org>
* misc/ruby-electric.el: Import ruby-electric.el 2.0.1 which fixes