mguterl

Which do you prefer and why?

Task contains enqueue_at an optional attribute that defines when (hour and minute) the job should be enqueued. If the attribute is not present, the current time should be used.

# tasks (id INT, enqueue_at DATETIME, action VARCHAR(255))
class Task < ActiveRecord::Base
end

mguterl

class TripsController < ApplicationController
  class Action < ApplicationController::Action
  end

  class New < Action
    expose(:trip) { Trip.new(params[:trip]) }
  end

  class Create < New
    def call

mguterl

module Upsertable
  def upsert_added!
    @upsert_added = true
  end

  def upsert_added?
    @upsert_added
  end

  def upsert_updated!

mguterl

Latency Comparison Numbers
--------------------------
L1 cache reference                            0.5 ns
Branch mispredict                             5   ns
L2 cache reference                            7   ns             14x L1 cache
Mutex lock/unlock                            25   ns
Main memory reference                       100   ns             20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy              3,000   ns
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD*              150,000   ns    0.15 ms

mguterl

require "net/http"

module Blocking

  module Sunspot

    class Server < ::Sunspot::Rails::Server

      def start
        @started = Time.now

mguterl

Don't be blind when making adjustments for performance. Measure, measure, measure.

Overview

New Relic is a great product for monitoring the peformance of your application. They provide performance management for Ruby, PHP, .Net, Java and Python. Today's presentation is going to focus on Ruby and specifically Rails, however, the basic New Relic overview will be applicable to any of the platforms mentioned. Integrating New Relic into your Rails application is as easy as signing up and adding the gem to your Rails application's Gemfile.

Apdex

When measuring performance in the browser or on the server New Relic provides Apdex scores. Apdex is

mguterl

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mguterl

# Syntax highlighting for pre/code blocks
require 'rack/pygmoku'
use Rack::Pygmoku, :lexer_attr => 'lang'

# Workaround https://github.com/heroku/heroku-buildpack-python/issues/5
RubyPython.configure :python_exe => 'python2.6'

mguterl

require "net/http"

module Sunspot
  class BlockingServer < ::Sunspot::Rails::Server
    def start
      @started = Time.now
      super
      up
    rescue ::Sunspot::Server::AlreadyRunningError
      # do nothing

mguterl

#!/usr/bin/env bash

# This is an RVM Project .rvmrc file, used to automatically load the ruby
# development environment upon cd'ing into the directory

# First we specify our desired <ruby>[@<gemset>], the @gemset name is optional,
# Only full ruby name is supported here, for short names use:
#     echo "rvm use 1.9.3" > .rvmrc
environment_id="ruby-1.9.3-p0@cincirb_katas"