normal	2018-06-02 06:23:20 +0900 (Sat, 02 Jun 2018)

  New Revision: 63546

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=63546

  Log:
    gc.c: reduce size slightly by making MEMOP_TYPE_MALLOC zero
    
    Most (if not all) architectures have instructions for comparing
    against zero, allowing compilers to generate more compact code.
    
    Other MEMOP_TYPE_* enum values are not compared in hot paths,
    but MEMOP_TYPE_MALLOC is checked in objspace_malloc_increase
    
       text	   data	    bss	    dec	    hex	filename
      84088	    264	   3664	  88016	  157d0	gc-before.o
      83784	    264	   3664	  87712	  156a0	gc.o

  Modified files:
    trunk/gc.c
Index: gc.c
===================================================================
--- gc.c	(revision 63545)
+++ gc.c	(revision 63546)
@@ -7785,9 +7785,9 @@ objspace_malloc_size(rb_objspace_t *objs https://github.com/ruby/ruby/blob/trunk/gc.c#L7785
 }
 
 enum memop_type {
-    MEMOP_TYPE_MALLOC  = 1,
-    MEMOP_TYPE_FREE    = 2,
-    MEMOP_TYPE_REALLOC = 3
+    MEMOP_TYPE_MALLOC  = 0,
+    MEMOP_TYPE_FREE,
+    MEMOP_TYPE_REALLOC
 };
 
 static inline void

--
ML: ruby-changes@q...
Info: http://www.atdot.net/~ko1/quickml/