Run results for: Switch vs Functional Approach 3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Vanilla Switch	10824798.0 Ops/sec
Switch Fn style	6031819.0 Ops/sec

Script Preparation code:

const use = (a, fn) => fn(a);

const isFunc = (v) => typeof v === 'function';

const isDefined = v => v !== undefined && v !== null;

const switchEnum = (e, handlers) => use(handlers[e] || handlers.else, fn => isFunc(fn) ? fn(e) : e);

function normal(inp) {
  switch (inp) {
    case "today":
      return 1;
    case "tomorrow":
      return 2;
    case "yesterday":
      return -1;
    default:
      return 0;	
  }
};

function funcccy(inp) {
 return switchEnum(inp, {
   "today": () => 1,
   "tomorrow": () => 2,
   "yesterday": () => -1,
   "else": () => 0,
  });
}

Tests:

Vanilla Switch
normal('today'); normal('yesterday'); normal('tomorrow');
Switch Fn style
funcccy('today'); funcccy('yesterday'); funcccy('tomorrow');

Run results for: Switch vs Functional Approach 3

Vanilla Switch

Switch Fn style