a-chernykh

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.box = "ubuntu/trusty64"

  config.vm.provider :virtualbox do |vb|
    vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"] # faster network
    vb.memory = 1024
    vb.cpus = 2
  end

a-chernykh

#!/bin/bash

export RAILS_ENV=<%= node[:application][:environment] %>
export PATH=$PATH:/usr/local/bin

APP_ROOT=<%= node[:application][:path] %>/current
PID=<%= node[:application][:path] %>/current/tmp/pids/unicorn.pid

old_pid="$PID.oldbin"

a-chernykh

a-chernykh

require 'delicious'
require 'json'
require 'csv'

TAGS_FILE = 'tags.json'
EDGES_FILE = 'tags.csv'

def get_tags
  cache_tags unless File.exist?(TAGS_FILE)
  JSON.parse(File.read(TAGS_FILE))  

a-chernykh

Searching for 648248 in sorted array
                           user     system      total        real
linear                34.070000   0.040000  34.110000 ( 34.127835)
native binary          0.000000   0.000000   0.000000 (  0.000203)
binary recursive       0.000000   0.000000   0.000000 (  0.000334)
binary iterative       0.000000   0.000000   0.000000 (  0.000258)

a-chernykh

class RomanToInt
  def initialize(roman)
    @roman = roman.downcase
  end

  def to_int
    result = 0
    roman = @roman

    exceptions.each do |exception, exception_value|

a-chernykh

class MyHashMap
  BUCKETS = 100

  attr_reader :iterations

  def initialize
    @values = []
    @iterations = 0
  end

a-chernykh

%i(net_http em_http typhoeus).each do |method|
  Benchmark.bm(15) do |x|
    (5..100).step(5) do |c|
      x.report("#{method} #{c}") { send("download_#{method}", urls, c) }
    end
  end
end

a-chernykh

require 'typhoeus'

def download_typhoeus(urls, concurrency)
  hydra = Typhoeus::Hydra.new(max_concurrency: concurrency)

  urls.each do |url|
    request = Typhoeus::Request.new url
    request.on_complete do |response|
      write_file url, response.body
    end

a-chernykh

require 'em-http'

def download_em_http(urls, concurrency)
  EventMachine.run do
    multi = EventMachine::MultiRequest.new

    EM::Iterator.new(urls, concurrency).each do |url, iterator|
      req = EventMachine::HttpRequest.new(url).get
      req.callback do
        write_file url, req.response