Refactor rb_shape_transition_shape_capa to not accept capacity

This way the groth factor is encapsulated, which allows
rb_shape_transition_shape_capa to be smarter about ideal sizes.

1 files changed, 3 insertions, 6 deletions

diff --git a/variable.c b/variable.c
index c30971bd08..15dc4831d8 100644
--- a/variable.c
+++ b/variable.c
@@ -1444,13 +1444,10 @@ rb_shape_t *
 rb_grow_iv_list(VALUE obj)
 {
     rb_shape_t * initial_shape = rb_shape_get_shape(obj);
-    uint32_t len = initial_shape->capacity;
-    RUBY_ASSERT(len > 0);
-    uint32_t newsize = (uint32_t)(len * 2);
+    RUBY_ASSERT(initial_shape->capacity > 0);
+    rb_shape_t * res = rb_shape_transition_shape_capa(initial_shape);
 
-    rb_shape_t * res = rb_shape_transition_shape_capa(initial_shape, newsize);
-
-    rb_ensure_iv_list_size(obj, len, newsize);
+    rb_ensure_iv_list_size(obj, initial_shape->capacity, res->capacity);
 
     rb_shape_set_shape(obj, res);