Run results for: forEach vs for..loop fixed length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

for

6.7M/s

reduce

4.1M/s

View exact numbers

Test name	Executions per second
✓ for	6,738,498 Ops/sec
reduce	4,144,150 Ops/sec

Script Preparation code:

var gsmCells = [
        {
            "countrycode": 250,
            "operatorid": 2,
            "lac": 9703,
            "cellid": 23446,
            "signal_strength": -75
        },
        {
            "countrycode": 250,
            "operatorid": 2,
            "lac": 9703,
            "cellid": 59141,
            "signal_strength": -76
        },
        {
            "countrycode": 250,
            "operatorid": 2,
            "lac": 9703,
            "cellid": 6924,
            "signal_strength": -80
        },
        {
            "countrycode": 250,
            "operatorid": 2,
            "lac": 9703,
            "cellid": 23449,
            "signal_strength": -81
        }
    ];

Tests:

reduce
let max = gsmCells[0]; gsmCells.forEach( (element, index) => { if(element.signal_strength > max.signal_strength) max = element; } )
for
let max = gsmCells[0]; const a = gsmCells.lenght; for(let i = 0; i < a; i++){ if(gsmCells[i].signal_strength > max.signal_strength) max = gsmCells[i]; }