speed up testsuit by using unlogged tables in PG

test.rb

# config/environments/test.rb

ActiveSupport.on_load(:active_record_postgresqladapter) do
  # For this optimization to work, you need to recreate your test database
  self.create_unlogged_tables = true
end

validate.rb

# Run `RAILS_ENV=test rails c`

puts ActiveRecord::Base.connection.execute("SELECT relpersistence FROM pg_class WHERE relname = 'users'").first

# In case table is unlogged following will be returned:
# {"relpersistence"=>"u"}

# In case table is regular, following will be returned:
#{"relpersistence"=>"p"}