diff --git a/lib/models/base.rb b/lib/models/base.rb
index 41b5b29e13e3..49fa6e87e9c4 100644
--- a/lib/models/base.rb
+++ b/lib/models/base.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require 'active_model'
 require 'yaml'
 
 module Beta
@@ -8,7 +9,27 @@ module Beta
   # instantiate all the files in the "FOLDER_IDENTIFIER" of the child
   # class.
   class Base
+    include ActiveModel::AttributeAssignment
+
     class << self
+      # `interesting_attributes` is a list of attributes that are
+      # relevant in our files, for which we're willing to define
+      # accessors. Before this we used OpenStruct but OpenStruct
+      # declares a method for every single hash key-value pair it is
+      # instantiated with – which is quite heavy especially when we
+      # have to do it for 2K+ members/startups/etc.
+      attr_reader :interesting_attributes
+
+      def interesting(*attrs)
+        @interesting_attributes ||= []
+
+        attrs.each do |attr|
+          attr_accessor attr
+
+          @interesting_attributes << attr
+        end
+      end
+
       def all
         @all ||= fetch_all
       end
@@ -23,5 +44,11 @@ def fetch_all
           .map { |id, data| new(data.merge('id' => id)) }
       end
     end
+
+    def initialize(hash)
+      attributes = self.class.interesting_attributes
+
+      assign_attributes(hash.slice(*attributes.map(&:to_s)))
+    end
   end
 end
diff --git a/lib/models/member.rb b/lib/models/member.rb
index 70dfbf650d5d..726f5947fe05 100644
--- a/lib/models/member.rb
+++ b/lib/models/member.rb
@@ -1,25 +1,19 @@
 # frozen_string_literal: true
 
-require 'active_model'
-
 require_relative 'base'
 
 module Beta
   class Member < Base
-    include ActiveModel::AttributeAssignment
-
-    attr_accessor :fullname, :role, :domaine, :missions, :startups, :previously
-
     FOLDER_IDENTIFIER = '_authors'
 
+    interesting :id, :fullname, :role, :domaine, :missions, :startups, :previously
+
     def initialize(hash)
-      assign_attributes(hash.slice(*%w[fullname role domaine missions startups previously]))
+      super
 
       @missions ||= []
       @startups ||= []
       @previously ||= []
-
-      super()
     end
 
     def active_missions
diff --git a/lib/models/startup.rb b/lib/models/startup.rb
index fafacc3de79b..4db39e678bcc 100644
--- a/lib/models/startup.rb
+++ b/lib/models/startup.rb
@@ -1,23 +1,13 @@
 # frozen_string_literal: true
 
-require 'active_model'
-
 require_relative 'base'
 
 module Beta
   # Startup represents all of our products in
   # `content/_startpus/*.md`.
   class Startup < Base
-    include ActiveModel::AttributeAssignment
-
-    attr_accessor :id, :title, :phases, :mission
-
     FOLDER_IDENTIFIER = '_startups'
 
-    def initialize(hash)
-      assign_attributes(hash.slice(*%w[id title phases mission]))
-
-      super()
-    end
+    interesting :id, :title, :phases, :mission, :accessibility_status
   end
 end
diff --git a/lib/pad.rb b/lib/pad.rb
index 4212d1e112cc..bf5899e85b01 100644
--- a/lib/pad.rb
+++ b/lib/pad.rb
@@ -29,7 +29,7 @@
 
 # 4. et on fait la différence
 
-startup_without_coaches = all_startups - startups_with_coaches
+startups_without_coaches = all_startups - startups_with_coaches
 
 # 5. le mieux pour explorer votre résultat :