Ruby on rails 浏览器无法缓存Rails 4站点的页面资源

在访问Rails 4站点时，我们使用Chrome开发者工具查看网络性能并监控各种资产的页面加载速度。这表明缓存的资产很少

诸如application-.js和appliation-.css文件之类的文件在页面加载之间没有改变，也没有被缓存

在config/environments/production.rb文件中，我们配置了以下内容：

    # Code is not reloaded between requests.
    config.cache_classes = true

    # Eager load code on boot. This eager loads most of Rails and
    # your application in memory, allowing both thread web servers
    # and those relying on copy on write to perform better.
    # Rake tasks automatically ignore this option for performance.
    config.eager_load = true

    # Full error reports are disabled and caching is turned on.
    config.consider_all_requests_local       = false
    config.action_controller.perform_caching = true

    # Disable Rails's static asset server (Apache or nginx will already do this).
    config.serve_static_files = false

    # Compress JavaScripts and CSS.
    config.assets.js_compressor = :uglifier
    config.assets.css_compressor = :sass

    # Do not fallback to assets pipeline if a precompiled asset is missed.
    config.assets.compile = false

    # Generate digests for assets URLs.
    config.assets.digest = true

    # Version of your assets, change this if you want to expire all your assets.
    config.assets.version = '1.0'

    # Set to :debug to see everything in the log.
    config.log_level = :info

    # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
    # the I18n.default_locale when a translation can not be found).
    config.i18n.fallbacks = true

    # Send deprecation notices to registered listeners.
    config.active_support.deprecation = :notify

    # Use default logging formatter so that PID and timestamp are not suppressed.
    config.log_formatter = ::Logger::Formatter.new

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有没有想过为什么会发生这种情况？谢谢。

这是我测试的浏览器设置的问题。退出并重新启动浏览器，静态元素再次按预期缓存。

这是我测试的浏览器设置的问题。退出并重新启动浏览器，静态元素再次按预期进行缓存