Run results for: spread vs iterator for getting first element

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

iterator

34.6M/s

spread

29.1M/s

View exact numbers

Test name	Executions per second
✓ iterator	34,552,864 Ops/sec
spread	29,065,966 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const elements = new Set(Array.from({length:10000},(i) => i));

Tests:

spread
const v = [...elements][0];
iterator
function first(iter){ for(const v of iter) return v; return undefined; } const v = first(elements);