Run results for: constants

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36

Browser: Chrome 80

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Constant as object property	1984124.0 Ops/sec
Just constant	1922649.9 Ops/sec

Script Preparation code:

const Type = {
  UNKNOWN: 0,
  STRING: 2,
  NUMBER: 3,
  OBJECT: 4
};

var object = {
  number: 1,
  string: "one"
};

var number = 1;
var string = "one";

function f1(v) {
	switch (typeof v) {
      case "object": return Type.OBJECT;
      case "string": return Type.STRING;
      case "number": return Type.NUMBER;
      default: return Type.UNKNOWN;
    }
}

const UNKNOWN = Type.UNKNOWN,
  STRING = Type.STRING,
  NUMBER = Type.NUMBER,
  OBJECT = Type.OBJECT;

function f2(v) {
	switch (typeof v) {
      case "object": return OBJECT;
      case "string": return STRING;
      case "number": return NUMBER;
      default: return UNKNOWN;
    }
}

Tests:

Constant as object property
f1(object); f1(string); f1(number);
Just constant
f2(object); f2(string); f2(number);

Constant as object property

Just constant