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Memoization for recursive closures

Published 1 decade ago by Michail Antonov with tags memoization recursion
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def startTime = System.currentTimeMillis()

def fact = {it -> sleep(100); it ?  it * call(it - 1g) : 1g}
fact = fact.memoize()
println fact(70)
println fact(71)

println ((System.currentTimeMillis() - startTime) / 1000.0)