a = {} of Int32 => String
num = 100_000_000
puts "doing #{num} records"

start = Time.now
1.upto(num) do |x|
  a[x] = x.to_s
end
diff = (Time.now - start).total_seconds
puts "set: #{diff} -- ( #{(num/diff).to_i} per second)"

# how much memory we using
pp `ps -p #{Process.pid} -o rss`

start = Time.now
match = num - 1
1.upto(num) do |x|
  b = a[x]
  # put second to last one just to make sure...
  if x  == match
     puts b
   end
end
diff = (Time.now - start).total_seconds
puts "get: #{diff} -- ( #{(num/diff).to_i} per second )"