Run results for: Enum vs const vs string

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Compare Enum string	9374693.0 Ops/sec
Compare Enum number	9243458.0 Ops/sec
compare const string	10602270.0 Ops/sec
compare const number	10656327.0 Ops/sec
compare inline string	19875886.0 Ops/sec
compare inline number	19958186.0 Ops/sec

Script Preparation code:

var MyEnum;
(function (MyEnum) {
  MyEnum[MyEnum["Unknown"] = 0] = "Unknown";
  MyEnum[MyEnum["Ok"] = 1] = "Ok";
  MyEnum[MyEnum["NotOk"] = 2] = "NotOk";
})(MyEnum || (MyEnum = {}));

var ConstEnumNumber = {
  Unknown: 0,
  Ok: 1,
  NotOk: 2
};

var ConstEnumString = {
  Unknown: "Unknown",
  Ok: "Ok",
  NotOk: "NotOk"
};

var unknownValueToCompareString = "Unknown";
var unknownValueToCompareNumber = 0;

Tests:

Compare Enum string
MyEnum.Unknown === unknownValueToCompareString;
Compare Enum number
MyEnum.Unknown === unknownValueToCompareNumber;
compare const string
ConstEnumString.Unknown === unknownValueToCompareString;
compare const number
ConstEnumString.Unknown === unknownValueToCompareNumber;
compare inline string
"Unknown" === unknownValueToCompareString;
compare inline number
0 === unknownValueToCompareNumber;

Run results for: Enum vs const vs string

this is used to try and better understand the performance costs of using enum's in typescript

Compare Enum string

Compare Enum number

compare const string

compare const number

compare inline string

compare inline number