Run results for: `a += b` vs `a = a + b`

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36

Browser: Chrome 84

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
a += b	1040677000.0 Ops/sec
a = a + b	1042189000.0 Ops/sec

Script Preparation code:

let a = 2;
let b = 2;

Tests: