Code for blog post "Benchmarking with Ruby"

auto_benchmark_with_ips.rb

require 'benchmark'
require 'benchmark/ips'

Benchmark.ips do |r|
  r.report("+ ") do
    42 + 42
  end

  r.report("* ") do
    42 * 42
  end
end

# =>Calculating -
# =>                  +      92249 i/100ms
# =>                  *      91950 i/100ms
# =>-
# =>                  +   6852082.4 (±6.8%) i/s -   34039881 in   4.998483s
# =>                  *   6280292.3 (±5.5%) i/s -   31263000 in   4.996057s

basic_benchmark.rb

require 'benchmark'

Benchmark.bm do |r|
  N = 100000

  r.report("+= ") do
    s = ""
    N.times { s += "1" }
  end

  r.report("<< ") do
    s = ""
    N.times { s << "1" }
  end
end

# =>         user           system        total         real
# => +=   1.060000   0.340000   1.400000 (  1.405588)
# => <<   0.030000   0.000000   0.030000 (  0.025614)

benchmark_with_ips.rb

require 'benchmark'
require 'benchmark/ips'

Benchmark.ips do |r|
  N = 100000

  r.report("+= ") do
    s = ""
    N.times { s += "." }
  end

  r.report("<< ") do
    s = ""
    N.times { s << "." }
  end
end

# => Calculating -
# =>                 +=          1 i/100ms
# =>                 <<          3 i/100ms
# =>-
# =>                 +=         0.2 (±0.0%) i/s -          2 in   8.508143s
# =>                 <<        33.9 (±3.0%) i/s -        171 in   5.054061s