gistfile1.rb

require 'benchmark'
require 'rubygems'
require 'couchrest'

SERVER = CouchRest.new
SERVER.default_database = 'misanthropy'

class Twat < CouchRest::ExtendedDocument
  use_database SERVER.default_database

  property :user_id
  property :body

  timestamps!
end

n = 5000
Benchmark.bm do |b|
  b.report("for:") {
    for i in 1..n do
      t = Twat.new
      t.user_id = i
      t.body = "#{i} for dongs"
      t.save
    end
  }

  b.report("upto:") {
    1.upto(n) do |i|
      t = Twat.new
      t.user_id = i
      t.body = "#{i} upto dongs"
      t.save
    end
  }

  b.report("times:") {
    n.times do |i|
      t = Twat.new
      t.user_id = i
      t.body = "#{i} times dongs"
      t.save
    end
  }
end

gistfile2.sh

nmartini@athena:~$ ruby test.rb
       user       system     total    real
for:   6.770000   1.340000   8.110000 ( 66.657872)
upto:  6.310000   1.130000   7.440000 ( 65.514294)
times: 5.690000   1.220000   6.910000 ( 57.944218)