From 2aacfed78174d852dc9014c756dc3f26fbfe0621 Mon Sep 17 00:00:00 2001
From: Maximo Mussini <maximomussini@gmail.com>
Date: Wed, 26 Jun 2024 14:50:45 -0300
Subject: [PATCH] perf: reduce `Configuration` instances to the bare minimum

---
 lib/inertia_rails/configuration.rb | 6 ++++++
 lib/inertia_rails/controller.rb    | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/inertia_rails/configuration.rb b/lib/inertia_rails/configuration.rb
index cf28dad..bc73c58 100644
--- a/lib/inertia_rails/configuration.rb
+++ b/lib/inertia_rails/configuration.rb
@@ -53,6 +53,12 @@ def merge(config)
       Configuration.new(**@options.merge(config.options))
     end
 
+    # Internal: Finalizes the configuration for a specific controller.
+    def with_defaults(config)
+      @options = config.options.merge(@options)
+      freeze
+    end
+
     OPTION_NAMES.each do |option|
       define_method(option) {
         evaluate_option @options[option]
diff --git a/lib/inertia_rails/controller.rb b/lib/inertia_rails/controller.rb
index faee00b..4e5b632 100644
--- a/lib/inertia_rails/controller.rb
+++ b/lib/inertia_rails/controller.rb
@@ -40,7 +40,7 @@ def use_inertia_instance_props
       def _inertia_configuration
         @_inertia_configuration ||= begin
           config = superclass.try(:_inertia_configuration) || ::InertiaRails.configuration
-          @inertia_config ? config.merge(@inertia_config.freeze).freeze : config
+          @inertia_config&.with_defaults(config) || config
         end
       end