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require 'benchmark'
class << Benchmark
# Earlier Ruby had a slower implementation.
if RUBY_VERSION < '1.8.7'
remove_method :realtime
def realtime
r0 = Time.now
yield
r1 = Time.now
r1.to_f - r0.to_f
end
end
def ms
1000 * realtime { yield }
end
end
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