Run results for: test mono and poly arrays

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36

Browser: Chrome 75

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
mono	101068.8 Ops/sec
poly	56317.6 Ops/sec

Tests:

mono
const a = new Array(1000).fill(0); let b, c; a.map(n => b = n); a.map(n => c = typeof n);
poly
const a = new Array(1000).fill(0); let b, c; a[0] = 'hello' a.map(n => b = n); a.map(n => c = typeof n);