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require 'rubygems'
iterations = 100
test_file = "#{File.dirname(__FILE__)}/benchmark.txt"
implementations = %w[BlueCloth RDiscount Maruku PEGMarkdown]
# Attempt to require each implementation and remove any that are not
# installed.
implementations.reject! do |class_name|
begin
module_path =
if class_name == 'PEGMarkdown'
'peg_markdown'
else
class_name.downcase
end
require module_path
false
rescue LoadError => boom
module_path.tr! '_', '-'
puts "#{class_name} excluded. Try: gem install #{module_path}"
true
end
end
# Grab actual class objects.
implementations.map! { |class_name| Object.const_get(class_name) }
# The actual benchmark.
def benchmark(implementation, text, iterations)
start = Time.now
iterations.times do |i|
implementation.new(text).to_html
end
Time.now - start
end
# Read test file
test_data = File.read(test_file)
# Prime the pump
puts "Spinning up ..."
implementations.each { |impl| benchmark(impl, test_data, 1) }
# Run benchmarks; gather results.
puts "Running benchmarks ..."
results =
implementations.inject([]) do |r,impl|
GC.start
r << [ impl, benchmark(impl, test_data, iterations) ]
end
puts "Results for #{iterations} iterations:"
results.each do |impl,time|
printf " %10s %09.06fs total time, %09.06fs average\n", "#{impl}:", time, time / iterations
end