Rack middleware so NewRelic shows time as ruby

snippet.rb

# This adds a request header so NewRelic knows when the middleware stack
# started processing. Hopefully this means we'll get better metrics, split
# between actual request queueing and time spent in the middlewares.
module Plex
  class MiddlewareStart
    def initialize(app)
      @app = app
    end

    def call(env)
      env["HTTP_X_MIDDLEWARE_START"] = "t=#{(Time.now.to_f * 1000000).to_i}"
      @app.call(env)
    end
  end
end

Rails.application.middleware.insert(0, Plex::MiddlewareStart)