memoization

Origin

Latin for “mindful remembering”

Description

Cache the return value of a function

Example

const memo = {}

function fib(n) {
if(memo[n]) {
return memo[n]
}
if(n <= 1) {
return 1
}

return memo[n] = fib(n -1) + fib(n - 2)

}

fib(5)
console.log(memo) // { ‘2’: 2, ‘3’: 3, ‘4’: 5, ‘5’: 8 }