Use test/performance/test_helper to do test setup then boost log level and turn on caching

railties/helpers/performance_test.rb

@@ -1,7 +1,4 @@
-ENV['RAILS_ENV'] ||= 'test'
-require "#{File.dirname(__FILE__)}/../../config/environment"
-require 'test/unit'
-require 'action_controller/performance_test'
+require 'performance/test_helper'
 
 # Profiling results for each test method are written to tmp/performance.
 class BrowsingTest < ActionController::PerformanceTest

railties/helpers/performance_test_helper.rb

@@ -0,0 +1,6 @@
+require 'test_helper'
+require 'action_controller/performance_test'
+
+ActionController::Base.perform_caching = true
+ActiveSupport::Dependencies.mechanism = :require
+Rails.logger.level = ActiveSupport::BufferedLogger::INFO

railties/lib/rails_generator/generators/applications/app/app_generator.rb

@@ -51,6 +51,7 @@ class AppGenerator < Rails::Generator::Base
       m.template "helpers/application.rb",        "app/controllers/application.rb", :assigns => { :app_name => @app_name, :app_secret => md5.hexdigest }
       m.template "helpers/application_helper.rb", "app/helpers/application_helper.rb"
       m.template "helpers/test_helper.rb",        "test/test_helper.rb"
+      m.template "helpers/performance_test_helper.rb", "test/performance/test_helper.rb"
       m.template "helpers/performance_test.rb",   "test/performance/browsing_test.rb"
 
       # database.yml and routes.rb

railties/lib/tasks/testing.rake

@@ -103,7 +103,7 @@ namespace :test do
   end
   Rake::Task['test:integration'].comment = "Run the integration tests in test/integration"
 
-  Rake::TestTask.new(:benchmark) do |t|
+  Rake::TestTask.new(:benchmark => 'db:test:prepare') do |t|
     t.libs << 'test'
     t.pattern = 'test/performance/**/*_test.rb'
     t.verbose = true
@@ -111,7 +111,7 @@ namespace :test do
   end
   Rake::Task['test:benchmark'].comment = 'Benchmark the performance tests'
 
-  Rake::TestTask.new(:profile) do |t|
+  Rake::TestTask.new(:profile => 'db:test:prepare') do |t|
     t.libs << 'test'
     t.pattern = 'test/performance/**/*_test.rb'
     t.verbose = true