Embed small size array elements in the heap.

It reduces the memory consumption and sometimes improve the
performance as well.  For example, the consumed memory size
of `bench/bm_ao_render.rb` is reduced from 1.2GB to 1GB, and
its total execution time become 18.795 sec from 22.229 sec.

1 files changed, 5 insertions, 3 deletions

diff --git a/mrbgems/mruby-random/src/random.c b/mrbgems/mruby-random/src/random.c
index f81d38fe6..b865244cc 100644
--- a/mrbgems/mruby-random/src/random.c
+++ b/mrbgems/mruby-random/src/random.c
@@ -217,13 +217,15 @@ mrb_ary_shuffle_bang(mrb_state *mrb, mrb_value ary)
 
     for (i = RARRAY_LEN(ary) - 1; i > 0; i--)  {
       mrb_int j;
+      mrb_value *ptr = RARRAY_PTR(ary);
       mrb_value tmp;
+      
 
       j = mrb_fixnum(mrb_random_mt_rand(mrb, random, mrb_fixnum_value(RARRAY_LEN(ary))));
 
-      tmp = RARRAY_PTR(ary)[i];
-      mrb_ary_ptr(ary)->ptr[i] = RARRAY_PTR(ary)[j];
-      mrb_ary_ptr(ary)->ptr[j] = tmp;
+      tmp = ptr[i];
+      ptr[i] = ptr[j];
+      ptr[j] = tmp;
     }
   }