Run results for: d3 max on array from vs d3 max twice

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
d3 max on array	19.3 Ops/sec
d3 max twice	754.2 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.min.js'></script>

Script Preparation code:

function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}
var days = ['Sun', 'Mon', 'Tue', 'Wed','Thu', 'Fri', 'Sat'];
var data = [...Array(1000)].map(_ => ({day: days[getRandomInt(7)], values: (new Float64Array(1000)).map(_ => getRandomInt(1000))}));

Tests:

d3 max on array
d3.max(data.flatMap(d => Array.from(d.values)));
d3 max twice
d3.max(data.map(d => d3.max(d.values)));