mrkn	2016-11-11 23:38:59 +0900 (Fri, 11 Nov 2016)

  New Revision: 56704

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=56704

  Log:
    rational.c: optimize rational + float.
    
    * rational.c (rb_rational_plus): optimize rational + float.
      Author: Tadashi Saito <tad.a.digger@g...>

  Modified files:
    trunk/rational.c
Index: rational.c
===================================================================
--- rational.c	(revision 56703)
+++ rational.c	(revision 56704)
@@ -715,6 +715,7 @@ f_addsub(VALUE self, VALUE anum, VALUE a https://github.com/ruby/ruby/blob/trunk/rational.c#L715
     return f_rational_new_no_reduce2(CLASS_OF(self), num, den);
 }
 
+static VALUE nurat_to_f(VALUE self);
 /*
  * call-seq:
  *    rat + numeric  ->  numeric
@@ -740,7 +741,7 @@ rb_rational_plus(VALUE self, VALUE other https://github.com/ruby/ruby/blob/trunk/rational.c#L741
 	}
     }
     else if (RB_TYPE_P(other, T_FLOAT)) {
-	return f_add(f_to_f(self), other);
+	return DBL2NUM(RFLOAT_VALUE(nurat_to_f(self)) + RFLOAT_VALUE(other));
     }
     else if (RB_TYPE_P(other, T_RATIONAL)) {
 	{

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