Run results for: if else vs switch case vs JSON

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

if/else

2K/s

switch/case

2K/s

JSON

2K/s

View exact numbers

Test name	Executions per second
✓ if/else	1,777 Ops/sec
switch/case	1,756 Ops/sec
JSON	1,570 Ops/sec

Script Preparation code:

var array = [1, 3, 2];
for(let i = 5; i > 0; i--) {
	var array = array.concat(array);
};

var mappingJSON = {
	1: function() {
    	return 'one';
    },
  	2: function() {
    	return 'two';
    },
  	3: function() {
    	return 'three';
  	}
};

Tests:

if/else
for(let i = array.length - 1; i >= 0; i--) { let item = array[i]; if(item === 1) { console.log('one'); } else if(item === 2) { console.log('two'); } else if(item === 3) { console.log('three'); }; };
switch/case
for(let i = array.length - 1; i >= 0; i--) { let item = array[i]; switch(item) { case 1: console.log('one'); break; case 2: console.log('two'); break; case 3: console.log('three'); break; }; };
JSON
for(let i = array.length - 1; i >= 0; i--) { let item = array[i]; console.log(mappingJSON[item]()); };

Run results for: if else vs switch case vs JSON

Compares if/else, switch/case and a JSON mapping to functions.

if/else

switch/case

JSON