Ruby on rails Rails 4.2应用程序开发速度非常慢

这几天来我一直在用头撞墙。 我的应用程序在开发模式下运行速度非常慢。在服务资产（尤其是图像）上花费了大量时间。每个请求都非常慢，加载一个简单的50kb jpeg需要7秒钟。总页面加载时间可能长达几分钟

我怀疑这与代码的自动加载有关，因为当我打开类缓存时，我的东西的加载速度要快得多（最多几百毫秒）。但这不是一个解决方案，因为我需要编码，所以我不能每次更改都重新启动服务器

这是我的config/development.rb

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports and disable caching.
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false
  config.reload_classes_only_on_change = true

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = false

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations.
  config.active_record.migration_error = :page_load

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = false

  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
  # yet still be able to expire them through the digest params.
  config.assets.digest = true

  # Adds additional error checking when serving assets at runtime.
  # Checks for improperly declared sprockets dependencies.
  # Raises helpful error messages.
  config.assets.raise_runtime_errors = true

  # Raises error for missing translations
  # config.action_view.raise_on_missing_translations = true

  config.action_mailer.default_url_options = { host: '127.0.0.1', port: 3000 }
  # email sending process
  config.action_mailer.perform_deliveries = true
  config.action_mailer.delivery_method = :test
  # Defaults to:
  # config.action_mailer.sendmail_settings = {
  #   location: '/usr/sbin/sendmail',
  #   arguments: '-i -t'
  # }
  config.action_mailer.perform_deliveries = true
  config.action_mailer.raise_delivery_errors = true
  config.action_mailer.default_options = {from: 'no-reply@example.com'}
  config.web_console.whitelisted_ips = '0.0.0.0/0.0.0.0'


end

和初始值设定人/assets.rb

# Be sure to restart your server when you modify this file.

# Version of your assets, change this if you want to expire all your assets.
Rails.application.config.assets.version = '1.0'
# Rails.application.config.assets.precompile += %w( jquery.Jcrop.min.scss )
# Rails.application.config.assets.precompile += %w( jquery.Jcrop.min.js )
# Rails.application.config.assets.precompile += %w( flat-ui.css.bak )
# Rails.application.config.assets.precompile += %w( bootsrap.css.map)
# Add additional assets to the asset load path
# Rails.application.config.assets.paths << Emoji.images_path

# Precompile additional assets.
# application.js, application.scss, and all non-JS/CSS in app/assets folder are already added.
# Rails.application.config.assets.precompile += %w( search.js )

Dir.glob("#{Rails.root}/app/assets/images/**/").each do |path|
  Rails.application.config.assets.paths << path
end

#修改此文件时，请确保重新启动服务器。
#如果要使所有资产过期，请更改此版本。
Rails.application.config.assets.version='1.0'
#Rails.application.config.assets.precompile+=%w（jquery.Jcrop.min.scss）
#Rails.application.config.assets.precompile+=%w（jquery.Jcrop.min.js）
#Rails.application.config.assets.precompile+=%w（flat-ui.css.bak）
#Rails.application.config.assets.precompile+=%w（bootsrap.css.map）
#将其他资源添加到资源加载路径
#Rails.application.config.assets.paths应用程序中可能会出现许多问题，例如，可能是N+1查询或一些缓慢的代码，HTTP查询到其他站点或大型资产包。所以我建议使用分析器，它将显示代码中的瓶颈。请参见下面列出的流行探查器：



您可以在此处找到其他有用的链接：

一款全新的应用程序是否也表现出同样的行为？申请单一资产怎么样？您使用什么方法启动应用程序？你使用的是什么操作系统？您在此处发布的这些文件几乎与问题无关。您能否尝试在
development.rb
中使用
config.assets.debug=true
？尝试预编译资产，有时会有所帮助