benchmark results

Without magic comment: 3.93 seconds
With magic comment: 1.93 seconds

2X faster!

prof.rb

# -*- immutable: string -*-

require 'benchmark.rb'

class NullLogger
  def info(message)
  end
end

LOGGER = NullLogger.new

def log(message)
  unless message == "none"
    LOGGER.info("prefix")
    LOGGER.info(message)
  end
end


res = Benchmark.measure do
  10_000_000.times do
    log("abcd")
  end
end

puts res