Run results for: Spred add vs slice concat

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36

Browser: Chrome 75

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Slice concat	1951175.0 Ops/sec
Spread add	9890912.0 Ops/sec

Tests:

Slice concat
const testArray = [1, 2, 3]; const newTestArray = testArray.concat(4);
Spread add
const testArray = [1, 2, 3]; const newTestArray = [...testArray, 4];