schneems

require 'benchmark/ips'

env = {"foo" => "bar", "bar" => "baz", "baz" => "boo", "PATH_INFO" => "foo"}

Benchmark.ips do |x|
  x.report("set and reset") do
    env["PATH_INFO"] = "zoo"
    env
    env["PATH_INFO"] = "foo"
  end

wycats

App.Router.map(function() {
  this.resource('post', { path: '/posts/:post_id' });
});

App.PostRoute = Ember.Route.extend({
  model: function(params) {
    return this.store.find('post', params.post_id);
  }
});

awesome

##
# by SoAwesomeMan
str =<<-EOS.gsub(/^[\s\t]*|[\s\t]*\n/, '') # no space "\s" for new line "\n"; kill tabs too
   select awesome, awesome, awesome, awesome, awesome, awesome,   
   from rad, rad, rad, rad, rad, rad, rad, rad, rad, rad, rad,   
   where cool cool cool cool cool cool cool cool cool cool cool'
EOS
# => "select awesome, awesome, awesome, awesome, awesome, awesome,from rad, rad, rad, rad, rad, rad, rad, rad, rad, rad, rad,where cool cool cool cool cool cool cool cool cool cool cool'"

str =<<-EOS.gsub(/^[\s\t]*/, '').gsub(/[\s\t]*\n/, ' ').strip # yes space "\s" for new line "\n"; kill tabs too

jjb

This all applies to Ruby 2.1. In some cases a setting is not available in 2.0, this is noted. There is also a different with 1.9, 1.8, and REE --- these are not noted.

All the relevant code is in https://github.com/ruby/ruby/blob/master/gc.c

RUBY_HEAP_MIN_SLOTS

default: 10000

The number of heap slots to start out with. This should be set high enough so that your app has enough or almost enough memory after loading so that it doesn't have to allocate more memory on the first request (althogh this probably isn't such a big deal for most apps).

(todo: figure out how big a slot is. i think the answer can be infered from this code.)

DanielKehoe

// https://segment.io/railsapps/snippet/
var analytics=analytics||[];analytics.load=function(e){var t=document.createElement("script");t.type="text/javascript",t.async=!0,t.src=("https:"===document.location.protocol?"https://":"http://")+"d2dq2ahtl5zl1z.cloudfront.net/analytics.js/v1/"+e+"/analytics.min.js";var n=document.getElementsByTagName("script")[0];n.parentNode.insertBefore(t,n);var r=function(e){return function(){analytics.push([e].concat(Array.prototype.slice.call(arguments,0)))}},i=["identify","track","pageview","ab"];for(var s=0;s<i.length;s++)analytics[i[s]]=r(i[s])},
analytics.load("xxxxxxxxxx");
// run analytics on every page
$(document).ready(function() {
  var user_id = $('#body').data('user_id')
  var user_name = $('#body').data('user_name')
  var user_plan = $('#body').data('user_plan')
  // https://segment.io/railsapps/setup
  analytics.identify(user_id, {

tordans

>> p = Project.find_by_id(1114)
# Project Load  (1) (0.001019)   SELECT * FROM `projects` WHERE (projects.deleted_at IS NULL OR projects.deleted_at > '2011-11-15 18:12:54') ORDER BY projects.id DESC LIMIT 1
=> #<Project id: 1114 …>

>> p.pictures.count
# Always a sql-query
# SQL  (1) (0.000572)   SELECT count(*) AS count_all FROM `basic_pictures` WHERE (`basic_pictures`.owner_id = 8004 AND `basic_pictures`.owner_type = 'Project') AND ( (`basic_pictures`.`type` = 'ProjectPicture' ) ) 
=> 60

>> p.pictures.size

scottwb

# Add AR::Base class methods for enumerating all the model
# classes in a Rails project.

module ActiveRecord
  class Base
    def self.all_model_classes
      connection.tables.map do |table|
        begin
          klass = Class.const_get(table.classify)
          klass.ancestors.include?(self) ? klass : nil