Don’t allocate array on no args

When no dependencies are present to be digested there is no reason to build an array just to turn around and turn it back into a string.

The dependencies array is not mutated in this method so we can use the same empty array across all invocations.

Total allocated: 791402 bytes (7294 objects)
Total allocated: 777442 bytes (7132 objects)

(791402 - 777442) / 791402.0 # => 1.76 % speed improvement

2 files changed, 2 insertions, 2 deletions

diff --git a/actionview/test/activerecord/relation_cache_test.rb b/actionview/test/activerecord/relation_cache_test.rb
index bd0cd10eaf..56e17e67a8 100644
--- a/actionview/test/activerecord/relation_cache_test.rb
+++ b/actionview/test/activerecord/relation_cache_test.rb
@@ -19,5 +19,5 @@ class RelationCacheTest < ActionView::TestCase
     assert_equal "Hello World", controller.cache_store.read("views/path/projects-#{Project.count}")
   end
 
-  def view_cache_dependencies; end
+  def view_cache_dependencies; []; end
 end
diff --git a/actionview/test/template/render_test.rb b/actionview/test/template/render_test.rb
index 8782eb4430..6ff7ddba0f 100644
--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -10,7 +10,7 @@ module RenderTestCases
   def setup_view(paths)
     @assigns = { secret: "in the sauce" }
     @view = Class.new(ActionView::Base) do
-      def view_cache_dependencies; end
+      def view_cache_dependencies; []; end
 
       def combined_fragment_cache_key(key)
         [ :views, key ]