Run results for: array math.max vs for loop

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/135.0.7049.53 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 135

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

basic for loop

1.7M/s

for loop length caching

1.7M/s

Math.max.apply

958K/s

Math.max with spread

473K/s

View exact numbers

Test name	Executions per second
✓ basic for loop	1,688,306 Ops/sec
for loop length caching	1,687,703 Ops/sec
Math.max.apply	957,863 Ops/sec
Math.max with spread	472,836 Ops/sec

Script Preparation code:

var arr = [];
var max = -Infinity;
for (i = 0; i < 1000; i++) { 
  arr.push(Math.random() * i);
}

Tests:

Math.max.apply
max = Math.max.apply(Math, arr);
Math.max with spread
max = Math.max(...arr);
basic for loop
for (let i = 0; i < arr.length; i++) { if (arr[i] > max) { max = arr[i]; } }
for loop length caching
for (let i = 0, len = arr.length; i < len; i++) { if (arr[i] > max) { max = arr[i]; } }

Run results for: array math.max vs for loop

compare finding the maximum value with math.max using .apply & using the spread (...) operator, vs a basic for loop with an if statement, & finally a basic foor loop using length caching

Math.max.apply

Math.max with spread

basic for loop

for loop length caching