Run results for: map vs for of

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for in	204.6 Ops/sec
map	281.2 Ops/sec

Script Preparation code:

var itemCount = 10000
var items = new Array(itemCount)

for (var i = itemCount - 1; i >= 0; i--) {
  items[i] = { id: i, data: 920501 }
}

Tests: