Run results for: Switch vs Object Literal vs If Else

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:104.0) Gecko/20100101 Firefox/104.0

Browser: Firefox 104

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Switch	312253.9 Ops/sec
Object Literal	280195.8 Ops/sec
If else	270907.0 Ops/sec

Script Preparation code:

var str = 'abc';
str = str.charAt(Math.floor(Math.random() * 3));

AخA
 
var str = 'abc';str = str.charAt(Math.floor(Math.random() * 3));

Tests:

Switch

switch (str) {
  case 'a': console.log('A'); break;
  case 'b': console.log('B'); break;
  case 'c': console.log('C'); break;
}

 
switch (str) {  case 'a': console.log('A'); break;  case 'b': console.log('B'); break;  case 'c': console.log('C'); break;}

Object Literal

var objLiteral = {
  a: function() {
    console.log('A');
  },
  b: function() {
    console.log('B');
  },
  c: function() {
    console.log('C');
  }
}

objLiteral[str]();

​x
 
var objLiteral = {  a: function() {    console.log('A');  },  b: function() {    console.log('B');  },  c: function() {    console.log('C');  }}​objLiteral[str]();

If else

if(str === 'a'){
	console.log('a')
}

if(str === 'b'){
	console.log('b')
}

if(str === 'c'){
	console.log('c')
}

 
if(str === 'a'){    console.log('a')}​if(str === 'b'){    console.log('b')}​if(str === 'c'){    console.log('c')}