performance: perf optimizations (#2954)

README.md

@@ -22,7 +22,7 @@
 
 ![](./public/avo-assets/logo-on-white.png)
 
-**<a href="https://avohq.io" title="Rails Admin Panel Framework">Avo - Ruby on Rails admin panel framework</a>**
+**<a href="https://avohq.io" title="Ruby on Rails Admin Panel Framework">Avo - Ruby on Rails Admin Panel Framework</a>**
 
 Avo is a very custom Admin Panel Framework, Content Management System, and Internal Tool Builder for Ruby on Rails that saves engineers and teams **months of development time**.
 

app/components/avo/fields/common/files/view_type/grid_item_component.html.erb

@@ -2,7 +2,7 @@
   <% if file.present? %>
     <div class="flex flex-col h-full">
       <% if file.representable? && is_image? %>
-        <%= image_tag helpers.main_app.url_for(file), class: "rounded-lg max-w-full self-start #{@extra_classes}" %>
+        <%= image_tag helpers.main_app.url_for(file), class: "rounded-lg max-w-full self-start #{@extra_classes}", loading: :lazy, width: file.metadata["width"], height: file.metadata["height"] %>
       <% elsif is_audio? %>
         <%= audio_tag(helpers.main_app.url_for(file), controls: true, preload: false, class: 'w-full') %>
       <% elsif is_video? %>

app/components/avo/index/grid_cover_empty_state_component.html.erb

@@ -1,3 +1,3 @@
 <div class="absolute bg-gray-50 w-full h-full">
-  <%= image_tag Avo.configuration.branding.placeholder, class: 'relative transform -translate-x-1/2 -translate-y-1/2 h-20 text-gray-400 inset-auto top-1/2 left-1/2' %>
+  <%= image_tag Avo.configuration.branding.placeholder, class: "relative transform -translate-x-1/2 -translate-y-1/2 h-20 text-gray-400 inset-auto top-1/2 left-1/2", loading: :lazy %>
 </div>

app/components/avo/index/grid_item_component.rb

@@ -48,7 +48,7 @@ def render_cover
   def link_to_cover
     classes = "absolute h-full w-full object-cover"
 
-    link_to image_tag(@card[:cover_url], class: classes), resource_view_path, class: classes, title: @card[:title]
+    link_to image_tag(@card[:cover_url], class: classes), resource_view_path, class: classes, title: @card[:title], loading: :lazy, width: "640", height: "480"
   end
 
   def render_title

lib/avo/base_resource.rb

@@ -150,11 +150,11 @@ def model_class(record_class: nil)
       # With uncountable models route key appends an _index suffix (Fish->fish_index)
       # Example: User->users, MediaItem->media_items, Fish->fish
       def model_key
-        model_class.model_name.plural
+        @model_key ||= model_class.model_name.plural
       end
 
       def class_name
-        to_s.demodulize
+        @class_name ||= to_s.demodulize
       end
 
       def route_key
@@ -170,7 +170,7 @@ def translation_key
       end
 
       def name
-        name_from_translation_key(count: 1, default: class_name.underscore.humanize)
+        @name ||= name_from_translation_key(count: 1, default: class_name.underscore.humanize)
       end
       alias_method :singular_name, :name
 
@@ -448,7 +448,6 @@ def authorization(user: nil)
     def file_hash
       content_to_be_hashed = ""
 
-      file_name = self.class.underscore_name.tr(" ", "_")
       resource_path = Rails.root.join("app", "avo", "resources", "#{file_name}.rb").to_s
       if File.file? resource_path
         content_to_be_hashed += File.read(resource_path)
@@ -463,6 +462,10 @@ def file_hash
       Digest::MD5.hexdigest(content_to_be_hashed)
     end
 
+    def file_name
+      @file_name ||= self.class.underscore_name.tr(" ", "_")
+    end
+
     def cache_hash(parent_record)
       result = [record, file_hash]
 

lib/avo/fields/base_field.rb

@@ -246,7 +246,7 @@ def record_errors
       end
 
       def type
-        self.class.name.demodulize.to_s.underscore.gsub("_field", "")
+        @type ||= self.class.name.demodulize.to_s.underscore.gsub("_field", "")
       end
 
       def custom?