Run results for: for-in: cached vs non-cached 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Non Cached	7.6 Ops/sec
Cached	8.2 Ops/sec

Script Preparation code:

class Second {
    dict = {}
    loopCached() {
        const dict = this.dict;
        for (const key in dict) {
            if (dict.hasOwnProperty(key)) {
                cb(dict[key], key);
            }
        }
    }
    loop() {
        for (const key in this.dict) {
            if (this.dict.hasOwnProperty(key)) {
                cb(this.dict[key], key);
            }
        }
    }
}

window.second = new Second();

for (let i = 0; i < 1e6; i++) {
    second["dict"][i] = i
}

const cb = (k, v) => {
    return v % 2
}

Tests:

Non Cached
second.loop()
Cached
second.loopCached()

Run results for: for-in: cached vs non-cached 2

Non Cached

Cached