Benchmark: Memoization (Object, WeakMap)

Tests:

Object
const memo = {} function fibonacci(n) { if (n <= 1) return n; if (memo[n]) return memo[n] memo[n] = fibonacci(n-1) + fibonacci(n-2) return memo[n] } fibonacci(40)
Map
const cache = new Map(); function fibonacci(n) { if (n <= 1) return n; if (cache.has(n)) { return cache.get(n); } cache.set(n, fibonacci(n-1) + fibonacci(n-2)) return cache.get(n) } fibonacci(40)

Rendered benchmark preparation results:

Previous results

Test case name	Result
Object
Map

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Windows

Object

533K/s

Map

318K/s

View exact numbers

Test name	Executions per second
✓ Object	533,429 Ops/sec
Map	318,316 Ops/sec

Memoization (Object, WeakMap) (version: 0)