benchmark results (with Marshal serialization)

1st       0.000000   0.000000   0.000000 (  0.001382)
10th      0.010000   0.000000   0.010000 (  0.002431)
100th     0.000000   0.000000   0.000000 (  0.001564)
1,000th   0.000000   0.000000   0.000000 (  0.002074)
10,000th  0.010000   0.000000   0.010000 (  0.006800)

benchmark results (with YAML serialization)

# These are using YAML.dump and YAML.load

1st       0.020000   0.000000   0.020000 (  0.014040)
10th      0.010000   0.000000   0.010000 (  0.012729)
100th     0.010000   0.000000   0.010000 (  0.013481)
1,000th   0.010000   0.000000   0.010000 (  0.015883)
10,000th  0.020000   0.000000   0.020000 (  0.021795)
100,000th  0.060000   0.000000   0.060000 (  0.066164)

noid_benchmark.rb

require 'benchmark'

def stateful_minter
  File.open('minter-state', File::RDWR | File::CREAT, 0644) do |f|
    # grab the state from a file
    f.flock(File::LOCK_EX)
    current_state = Marshal.load(f.read)
    # instantiate a minter with the provided state
    minter = described_class.new(current_state)
    
    yield minter if block_given?
    
    # overwrite the state file
    f.rewind
    # dump the minter state and get it in serializable form
    state = Marshal.dump(minter.dump)
    # serialize the state
    f.write(state)
    f.flush
    f.truncate(f.pos)
end

# create the minter
minter = described_class.new(template: '.reeddeeddk')
# serialize its initial state (at the beginning of its sequence)
File.open('minter-state', File::RDWR | File::CREAT, 0644) { |f| f.write(Marshal.dump(minter.dump)) }

# test how long it takes to mint an ID at different points in the sequence
Benchmark.bm(7) do |x|
  x.report('1st') { stateful_minter(&:mint) }
  9.times { stateful_minter(&:mint) }
  x.report('10th') { stateful_minter(&:mint) }
  90.times { stateful_minter(&:mint) }
  x.report('100th') { stateful_minter(&:mint) }
  900.times { stateful_minter(&:mint) }
  x.report('1,000th') { stateful_minter(&:mint) }
  9_000.times { stateful_minter(&:mint) }
  x.report('10,000th') { stateful_minter(&:mint) }
  90_000.times { stateful_minter(&:mint) }
  x.report('100,000th') { stateful_minter(&:mint) }
  900_000.times { stateful_minter(&:mint) }
  x.report('1,000,000th') { stateful_minter(&:mint) }
  1_000_000.times { stateful_minter(&:mint) }
  x.report('2,000,000th') { stateful_minter(&:mint) }
  1_000_000.times { stateful_minter(&:mint) }
  x.report('3,000,000th') { stateful_minter(&:mint) }
end