alex-quiterio

/*
 * Updated to use the function-based method described in http://www.phpied.com/social-button-bffs/
 * Better handling of scripts without supplied ids.
 *
 * N.B. Be sure to include Google Analytics's _gaq and Facebook's fbAsyncInit prior to this function.
 */

(function(doc, script) {
    var js, 
        fjs = doc.getElementsByTagName(script)[0],

alex-quiterio

echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://npmjs.org/install.sh | sh

alex-quiterio

--type-add=css=.sass,.less,.scss
--type-add=ruby=.rake,.rsel,.builder,.thor
--type-add=html=.haml,.html.erb,.html.haml
--type-add=js=.js.erb,.coffee
--type-set=cucumber=.feature
--type-set=c=.c,.cpp,.ino,.pde,.h
--ignore-dir=vendor
--ignore-dir=log
--ignore-dir=tmp
--ignore-dir=doc

alex-quiterio

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

alex-quiterio

source :rubygems

gem 'rails', '3.0.4'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'pg'
gem 'ar-octopus', :git => 'git://github.com/tchandy/octopus.git', :require => "octopus"

alex-quiterio

Security is Hard

Massive Assignment

• watch for ActiveRecord Relation, like has_many, has_many :through
• watch for user_roles, `group_users
• UPDATE action

Admin

alex-quiterio

$VERBOSE = nil
require File.expand_path('../rooby', __FILE__)


Person = Rooby::Class.new 'Person' do
  define :initialize do |name|
    @name = name
  end
  
  define :name do

alex-quiterio

Benchmarking Nginx with Go

Today I just wanted to know which of these options is faster:

• Go HTTP standalone
• Nginx proxy to Go HTTP
• Nginx fastcgi to Go TCP FastCGI
• Nginx fastcgi to Go Unix Socket FastCGI

Hardware

alex-quiterio

--- module ScottsSnake where

import Keyboard
import Random
import String
import Set

type Position = {x: Int, y: Int }
type Board = {w: Int, h: Int, wall: [Position]}
type Apple = Position

alex-quiterio

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