Fixes ivar benchmarks to not depend on object allocation

Prior to this change, we were measuring object allocation as well
as setting instance variables within ivar benchmarks. With this
change, we now only measure setting instance variables within
ivar benchmarks.

1 files changed, 6 insertions, 3 deletions

diff --git a/benchmark/vm_ivar_set_subclass.yml b/benchmark/vm_ivar_set_subclass.yml
index 2653d36ded..bc8bf5bf6b 100644
--- a/benchmark/vm_ivar_set_subclass.yml
+++ b/benchmark/vm_ivar_set_subclass.yml
@@ -1,6 +1,6 @@
 prelude: |
   class A
-    def initialize
+    def set_ivars
       @a = nil
       @b = nil
       @c = nil
@@ -10,8 +10,11 @@ prelude: |
   end
   class B < A; end
   class C < A; end
+
+  b = B.new
+  c = C.new
 benchmark:
   vm_ivar_init_subclass: |
-    B.new
-    C.new
+    b.set_ivars
+    c.set_ivars
 loop_count: 3000000