This blog describes anything about @mrkn's thoughts, which includes computer programming (mostly Ruby, Haskell, and C++), mathematics, physics, and so on. Each article is written in English for learning it.
2010-09-06
We can get faster fib just returning two values
How do you make fib fast?
I don't recomend using memoization because it require waste memory.
I recommend returning two values.
A simple method that is a direct recursive implementation mathematical recurrence relation given. We can observe that this implementation does a lot of repeated work see the following recursion tree. So this is a bad implementation Write My Essay For Me Cheap for nth Fibonacci number. We can optimize the space used in method 2 by storing the previous two numbers only because that is all we need to get the next Fibonacci number in series.
A simple method that is a direct recursive implementation mathematical recurrence relation given. We can observe that this implementation does a lot of repeated work see the following recursion tree. So this is a bad implementation Write My Essay For Me Cheap for nth Fibonacci number. We can optimize the space used in method 2 by storing the previous two numbers only because that is all we need to get the next Fibonacci number in series.
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