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+日 12月 14 12:51:48 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* bignum.c (rb_big_mul): faster multiplication by Karatsuba method and
+	  twice faster square than normal multiplication.
+
+	* random.c (rb_rand_internal): used by Bignum#*.
+	
+	* test/ruby/test_bignum.rb: add some tests for above.
+
 Sun Dec 14 09:14:37 2008  Yuki Sonoda (Yugui)  <yugui@yugui.jp>
 
 	* reverts r20713.