Run results for: а я думал создание итератора будет дороже

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Tests:

smi
function add(a,b) { return a + b; } var arr = Array.from({length: 10000}, (_, i) => ([i, i+1])) var xs = arr.map(pair => add(pair[0], pair[1]))
deopt to heapnumber
function add(a,b) { return a + b; } var arr = Array.from({length: 10000}, (_, i) => Math.random() > 0.95 ? ([i, i+1]) : ([i, i+1.1])) var xs = arr.map(pair => add(pair[0], pair[1]))
iterator
function add(a,b) { return a + b; } var arr = Array.from({length: 10000}, (_, i) => ([i, i+1])) var xs = arr.map(([a,b]) => add(a, b))