Ruby String Concatenation Benchmark

require 'benchmark'

n = 2000

Benchmark.bmbm do |x|
  x.report('+=') {
    num = rand.to_s[0..10] * 100
    c = ""

    n.times { c += num }
  }

  x.report('<<') {
    num = rand.to_s[0..10] * 100
    c = ""

    n.times { c << num }
  }

  x.report('#{}'){
    num = rand.to_s[0..10] * 100
    c = ""

    n.times { c = "#{c}#{num}" }
  }
end