Run results for: objlit vs map

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36

Browser: Chrome 80

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Object literal	2025289.0 Ops/sec
Switch	2022409.0 Ops/sec

Script Preparation code:

var brands = [
"Mastercard",
"Visa",
"AmericanExpress",
"DinersClub",
"Discover",
"JCB",
"UnionPay"
]
var brand = brands[Math.floor(Math.random() * 7)];

Tests:

Object literal
var map = { Mastercard:"Mastercard", Visa:"Visa", AmericanExpress:"American Express", DinersClub: "Diners Club", Discover: "Discover", JCB: "JCB", UnionPay:"UnionPay", } map[brand]
Switch
switch (brand) { case "Mastercard": return "Mastercard"; case "Visa": return "Visa"; case "American Express": return "AmericanExpress"; case "Diners Club": return "DinersClub"; case "Discover": return "Discover"; case "JCB": return "Jcb"; case "UnionPay": return "UnionPay"; default: return "UnknownCard"; }

Run results for: objlit vs map

Object literal

Switch