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require 'benchmark'
class Fib
def fib_ruby(n)
if n < 2
n
else
fib5(n - 2) + fib5(n - 1)
end
end
def fibx(n); fib_ruby(n); end
alias_method :fib, :fibx
def fib2x(n); fib(n); end
alias_method :fib2, :fib2x
def fib3x(n); fib2(n); end
alias_method :fib3, :fib3x
def fib4x(n); fib3(n); end
alias_method :fib4, :fib4x
def fib5x(n); fib4(n); end
alias_method :fib5, :fib5x
end
TIMES = (ARGV[0] || 5).to_i
N = (ARGV[1] || 30).to_i
TIMES.times {
puts Benchmark.measure { Fib.new.fib5(N) }
}
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