diff --git a/Gemfile b/Gemfile
index eb310d43..230b5843 100644
--- a/Gemfile
+++ b/Gemfile
@@ -65,3 +65,8 @@ gem 'record_tag_helper', '~> 1.0', '>= 1.0.1'
 
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '~> 1.16', require: false
+
+# For investigating performance issues.
+gem "rack-mini-profiler", "~> 3.1"
+gem "memory_profiler", "~> 1.0"
+gem "stackprof", "~> 0.2.25"
diff --git a/Gemfile.lock b/Gemfile.lock
index d71bd61c..dd4e66c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -154,6 +154,7 @@ GEM
       net-pop
       net-smtp
     marcel (1.0.2)
+    memory_profiler (1.0.1)
     mime-types (3.4.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2023.0218.1)
@@ -189,6 +190,8 @@ GEM
     rack (2.2.8)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
+    rack-mini-profiler (3.1.1)
+      rack (>= 1.2.0)
     rack-session (1.0.1)
       rack (< 3)
     rack-test (2.1.0)
@@ -273,6 +276,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    stackprof (0.2.25)
     stringio (3.0.8)
     temple (0.8.2)
     terser (1.1.17)
@@ -314,11 +318,13 @@ DEPENDENCIES
   httparty (~> 0.21.0)
   jsbundling-rails (~> 1.1)
   letter_opener (~> 1.8, >= 1.8.1)
+  memory_profiler (~> 1.0)
   mysql2 (~> 0.5.5)
   nokogiri (~> 1.15, >= 1.15.3)
   parallel (~> 1.23)
   puma (~> 6.3, >= 6.3.1)
   rack-attack (~> 6.7)
+  rack-mini-profiler (~> 3.1)
   rails (~> 7.1, >= 7.1.1)
   rails-i18n (~> 7.0, >= 7.0.7)
   rdiscount (~> 2.2, >= 2.2.7.1)
@@ -328,6 +334,7 @@ DEPENDENCIES
   sanitize (~> 6.0, >= 6.0.2)
   sass-rails (~> 6.0)
   sprockets (~> 4.2)
+  stackprof (~> 0.2.25)
   terser (~> 1.1, >= 1.1.17)
   web-console (~> 4.2)
   will_paginate (~> 4.0)
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 92e0a417..d29ab94a 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -13,6 +13,13 @@ class ApplicationController < ActionController::Base
   before_action :save_return_to_path,
     if: ->(c) { c.controller_name == 'sessions' && c.action_name == 'new' }
 
+  # Enable profiling tools if logged in as admin.
+  before_action do
+    if current_user && current_user.admin?
+      Rack::MiniProfiler.authorize_request
+    end
+  end
+
   def authenticate_user!
     redirect_to(new_auth_user_session_path) unless user_signed_in?
   end
diff --git a/config/initializers/rack_mini_profiler.rb b/config/initializers/rack_mini_profiler.rb
new file mode 100644
index 00000000..0cb95573
--- /dev/null
+++ b/config/initializers/rack_mini_profiler.rb
@@ -0,0 +1,3 @@
+Rails.configuration.to_prepare do
+	Rack::MiniProfiler.config.enable_advanced_debugging_tools = true
+end
diff --git a/vendor/cache/memory_profiler-1.0.1.gem b/vendor/cache/memory_profiler-1.0.1.gem
new file mode 100644
index 00000000..423255dc
Binary files /dev/null and b/vendor/cache/memory_profiler-1.0.1.gem differ
diff --git a/vendor/cache/rack-mini-profiler-3.1.1.gem b/vendor/cache/rack-mini-profiler-3.1.1.gem
new file mode 100644
index 00000000..ac09e439
Binary files /dev/null and b/vendor/cache/rack-mini-profiler-3.1.1.gem differ
diff --git a/vendor/cache/stackprof-0.2.25.gem b/vendor/cache/stackprof-0.2.25.gem
new file mode 100644
index 00000000..f27a00ad
Binary files /dev/null and b/vendor/cache/stackprof-0.2.25.gem differ