diff --git a/Gemfile b/Gemfile
index 084978c..5122869 100644
--- a/Gemfile
+++ b/Gemfile
@@ -45,10 +45,12 @@ group :development do
   gem 'capistrano-bundler', require: false
   gem 'capistrano-rails', require: false
   gem 'capistrano-rbenv', require: false
+  gem 'derailed_benchmarks'
   gem 'ed25519'
   gem 'rubocop-rails'
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'
+  gem 'stackprof'
   gem 'yard'
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index c7ff27b..b91e0ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,6 +48,7 @@ GEM
     ast (2.4.0)
     bcrypt (3.1.13)
     bcrypt_pbkdf (1.0.1)
+    benchmark-ips (2.7.2)
     bootsnap (1.4.5)
       msgpack (~> 1.0)
     builder (3.2.4)
@@ -68,6 +69,15 @@ GEM
     concurrent-ruby (1.1.6)
     crass (1.0.6)
     database_cleaner (1.8.3)
+    derailed_benchmarks (1.6.0)
+      benchmark-ips (~> 2)
+      get_process_mem (~> 0)
+      heapy (~> 0)
+      memory_profiler (~> 0)
+      rack (>= 1)
+      rake (> 10, < 14)
+      ruby-statistics (>= 2.1)
+      thor (>= 0.19, < 2)
     ed25519 (1.2.4)
     erubi (1.9.0)
     factory_bot (5.1.1)
@@ -76,8 +86,11 @@ GEM
       factory_bot (~> 5.1.0)
       railties (>= 4.2.0)
     ffi (1.12.2)
+    get_process_mem (0.2.5)
+      ffi (~> 1.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
+    heapy (0.1.4)
     hkdf (0.3.0)
     i18n (1.8.2)
       concurrent-ruby (~> 1.0)
@@ -96,6 +109,7 @@ GEM
       mini_mime (>= 0.1.1)
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
+    memory_profiler (0.9.14)
     method_source (0.9.2)
     mimemagic (0.3.4)
     mini_mime (1.0.2)
@@ -163,6 +177,7 @@ GEM
       rack (>= 1.1)
       rubocop (>= 0.72.0)
     ruby-progressbar (1.10.1)
+    ruby-statistics (2.1.1)
     ruby_dep (1.5.0)
     spring (2.1.0)
     spring-watcher-listen (2.0.1)
@@ -179,6 +194,7 @@ GEM
     sshkit (1.20.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
+    stackprof (0.2.15)
     thor (1.0.1)
     thread_safe (0.3.6)
     tzinfo (1.2.6)
@@ -207,6 +223,7 @@ DEPENDENCIES
   capistrano-rails
   capistrano-rbenv
   database_cleaner
+  derailed_benchmarks
   ed25519
   factory_bot_rails
   jbuilder (~> 2.5)
@@ -219,6 +236,7 @@ DEPENDENCIES
   spring
   spring-watcher-listen (~> 2.0.0)
   sqlite3
+  stackprof
   validate_url
   webpush
   yard
diff --git a/config/application.rb b/config/application.rb
index b6e6718..6e33679 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -7,12 +7,7 @@ require 'rails'
 require 'active_model/railtie'
 require 'active_job/railtie'
 require 'active_record/railtie'
-require 'active_storage/engine'
 require 'action_controller/railtie'
-require 'action_mailer/railtie'
-require 'action_view/railtie'
-require 'action_cable/engine'
-# require "sprockets/railtie"
 require 'rails/test_unit/railtie'
 
 # Require the gems listed in Gemfile, including any gems
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 57350f2..8d43164 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -33,12 +33,12 @@ Rails.application.configure do
 
   # Store uploaded files on the local file system (see
   # config/storage.yml for options)
-  config.active_storage.service = :local
+  # config.active_storage.service = :local
 
   # Don't care if the mailer can't send.
-  config.action_mailer.raise_delivery_errors = false
+  # config.action_mailer.raise_delivery_errors = false
 
-  config.action_mailer.perform_caching = false
+  # config.action_mailer.perform_caching = false
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
diff --git a/config/environments/production.rb b/config/environments/production.rb
index bd428d2..970f384 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -37,7 +37,7 @@ Rails.application.configure do
 
   # Store uploaded files on the local file system (see
   # config/storage.yml for options)
-  config.active_storage.service = :local
+  # config.active_storage.service = :local
 
   # Mount Action Cable outside main process or domain
   # config.action_cable.mount_path = nil
@@ -64,7 +64,7 @@ Rails.application.configure do
   # config.active_job.queue_adapter     = :resque
   # config.active_job.queue_name_prefix = "miniloom-api_#{Rails.env}"
 
-  config.action_mailer.perform_caching = false
+  # config.action_mailer.perform_caching = false
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 5f9329d..157d21d 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -34,14 +34,14 @@ Rails.application.configure do
 
   # Store uploaded files on the local file system in a temporary
   # directory
-  config.active_storage.service = :test
+  # config.active_storage.service = :test
 
-  config.action_mailer.perform_caching = false
+  # config.action_mailer.perform_caching = false
 
   # Tell Action Mailer not to deliver emails to the real world.
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
-  config.action_mailer.delivery_method = :test
+  # config.action_mailer.delivery_method = :test
 
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr