matz	2009-02-24 00:51:31 +0900 (Tue, 24 Feb 2009)

  New Revision: 22575

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=22575

  Log:
    * math.c (Need_Float): call rb_to_float() only when it is really
      needed.  small performance improvement.

  Modified files:
    trunk/ChangeLog
    trunk/math.c

Index: math.c
===================================================================
--- math.c	(revision 22574)
+++ math.c	(revision 22575)
@@ -16,7 +16,7 @@
 VALUE rb_mMath;
 
 extern VALUE rb_to_float(VALUE val);
-#define Need_Float(x) (x) = rb_to_float(x)
+#define Need_Float(x) do {if (TYPE(x) != T_FLOAT) {(x) = rb_to_float(x);}} while(0)
 #define Need_Float2(x,y) do {\
     Need_Float(x);\
     Need_Float(y);\
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 22574)
+++ ChangeLog	(revision 22575)
@@ -3,6 +3,9 @@
 	* range.c (range_each): check #succ only when it is really
 	  needed.  small performance improvement.
 
+	* math.c (Need_Float): call rb_to_float() only when it is really
+	  needed.  small performance improvement.
+
 Tue Feb 24 00:19:33 2009  Yukihiro Matsumoto  <matz@r...>
 
 	* lib/pathname.rb (Pathname#foreachline): removed wrongly

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