Simple Ruby Benchmark Class

bench.rb

require 'xrbp'

class Benchmark
  def initialize(max=1000)
    @max = max
    @snapshots = []
  end

  def capture!(n=1)
    @snapshots << [n, Time.now]

    @snapshots.shift until @snapshots.size <= @max
  end

  def first
    @snapshots.first.last
  end

  def last
    @snapshots.last.last
  end

  def average
    total = @snapshots.collect { |s| s.first }.sum
    duration = last - first
    total / duration
  end
end # class Benchmark

b = Benchmark.new
b.capture!(1) 
sleep(1)
b.capture!(2) 
sleep(1)
b.capture!(1) 
puts b.average