mongo-ruby-driver/bin/gridstore_benchmark

#!/usr/bin/env ruby
require 'rubygems'
require 'mongo'
require 'mongo/gridfs'
require 'benchmark'

include Mongo
include GridFS

db = Connection.new['benchmark-gridfs']
sample_data = File.open(File.join(File.dirname(__FILE__), 'sample_file.pdf'), 'r').read
GridStore.delete(db, 'mongodb.pdf')

length = sample_data.length
mb     = length / 1048576.0

t1 = Time.now
GridStore.open(db, 'mongodb.pdf', 'w') do |f|
  f.write(sample_data)
end
puts "Write: #{mb / (Time.now - t1)} mb/s"

t1 = Time.now
GridStore.open(db, 'mongodb.pdf', 'r') do |f|
  data = f.read
end
puts "Read: #{mb / (Time.now - t1)} mb/s"