Benchmark finding max value

ruby_bench_max.rb

require 'benchmark/ips'


def fast(a, b)
  a > b ? a : b
end

def slow(a, b)
  [a, b].max
end


class GCSuite
  def warming(*)
    run_gc
  end

  def running(*)
    run_gc
  end

  def warmup_stats(*); end
  def add_report(*); end

  private

  def run_gc
    GC.enable
    GC.start
    GC.disable
  end
end


Benchmark.ips do |x|
  x.config(time: 10, warmup: 2, suite: GCSuite.new)
  x.stats = :bootstrap
  x.confidence = 95

  x.report('fast code') do |times|
    i = 0
    while i < times
      fast(100, 200)
      i += 1
    end
  end
  x.report('slow code') do |times|
    i = 0
    while i < times
      slow(100, 200)
      i += 1
    end
  end
  x.compare!
end