Run results for: js length vs cached length!!

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/100.0.0.0

Browser: Opera 100

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Map 1	727.9 Ops/sec
Map 2	543.9 Ops/sec

Script Preparation code:

var i = 0, count = 30000, a, b;
var arr = []

for (i = 0; i < count; i++) {
  if (Math.random() > 0.5) {
    arr.push(i * i);
  }
}

Tests: