Run results for: Symbol vs String property square bracket

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/70.0.3538.75 Mobile/15E148 Safari/605.1

Browser: Chrome Mobile iOS 70

Operating system: iOS 12.5

Device Platform: Mobile

Date tested: one year ago

String

22.4M/s

Symbol

21.6M/s

View exact numbers

Test name	Executions per second
✓ String	22,390,088 Ops/sec
Symbol	21,603,908 Ops/sec

Script Preparation code:

var foo = {};
var sym = Symbol("key");
var str = "key";

Tests:

Symbol
foo[sym] = 1;
String
foo[str] = 1;