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ruby / benchmark / bm_so_random.rb
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# from http://www.bagley.org/~doug/shootout/bench/random/random.ruby
 
IM = 139968.0
IA = 3877.0
IC = 29573.0
 
$last = 42.0
 
def gen_random(max)
  (max * ($last = ($last * IA + IC) % IM)) / IM
end
 
N = 1000000
 
i=0
while i<N
  i+=1
  gen_random(100.0)
end
# "%.9f" % gen_random(100.0)