一个用于每一天JavaScript示例-使用缓存计算（memoization）为了提高应用程序性能

<!DOCTYPE html>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

<title>每天一个JavaScript实例-使用缓存计算（memoization）来提高应用程序性能</title>

<script>

window.onload = function(){

		var fibonacci = function(){

				var memo = [0,1];

				var fib = function(n){

					var result = memo[n];

					if(typeof result != "number"){

							result = fib(n-1) + fib(n-2);

							memo[n] = result;

						}

						console.log("memo"+memo);

						return result;

					};

					return fib;

			}();

			var fib =function(n){

					return n<2?

n:fib(n-1)+fib(n-2);

				};

			console.time("non-memo");

			for(var i = 0; i<=10;i++){

					console.log(i+ " " + fib(i));

				}

			console.timeEnd("non-memo");

			console.time("memo");

			for(var i = 0; i<=10;i++){

				console.log(i+ " " + fibonacci(i) );

			}

			console.timeEnd("memo");

	}

</script>

</head>

<body>

</body>

</html>