Run results for: WeakMap vs arrays read performance (fixed)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.81 Safari/537.36

Browser: Chrome 98

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
arrays	81.3 Ops/sec
weakmap	65.2 Ops/sec

Script Preparation code:

var keys = [];
var values = [];
var weakmap = new WeakMap();
for (let i = 0; i < 100000; i++) {
    const keyobj = {
        key: i
    };
    const valobj = {
        val: `val_${i}`
    };
    keys[i] = keyobj;
    values[i] = valobj;
    weakmap.set(keyobj, valobj);
}

Tests:

arrays
for (let i = 0; i < 100000; i++) { const key = keys[i]; const val = values[key.key]; }
weakmap
for (let i = 0; i < 100000; i++) { const key = keys[i]; const val = weakmap.get(key); }