Switch case vs Const Object Performance - Clean code with better performance.

switch_vs_constObj.js

//Switch case vs Const Object Performance
//Const Object  is 20%-50% faster
//Comment the lines of code for "counter [x] ++;" and check the difference

const NAMES = [
    'Zarya',
    'Inna',
    'Antoniya',
    'Filippa',
    'Irina',
    'Sevastian',
    'Arisha',
    'Dmitriy',
    'Vlad',
    'Mariya',
    'Svetlana',
    'Nastasya',
    'Yuliana',
    'Viktoriya'];



const SET_DEFAULT_NAME = 'Elena';
const SET_NAME = {
    Zarya: 'Zarya',
    Inna: 'Inna',
    Antoniya: 'Antoniya',
    Filippa: 'Filippa',
    Irina: 'Irina',
    Sevastian: 'Sevastian',
    Arisha: 'Arisha',
    Dmitriy: 'Dmitriy',
    Vlad: 'Vlad',
    Mariya: 'Mariya',
    Svetlana: 'Svetlana',
    Nastasya: 'Nastasya',
    Yuliana: 'Yuliana',
    Viktoriya: 'Viktoriya'
};

var counter = {
    Zarya: 0,
    Inna: 0,
    Antoniya: 0,
    Filippa: 0,
    Irina: 0,
    Sevastian: 0,
    Arisha: 0,
    Dmitriy: 0,
    Vlad: 0,
    Mariya: 0,
    Svetlana: 0,
    Nastasya: 0,
    Yuliana: 0,
    Viktoriya: 0,
    Elena: 0
};

var randomSequence = [];

for (var i = 0; i < 10000000; i++)
    randomSequence.push(Math.floor(Math.random() * (NAMES.length + 1)));




console.time("switch");
for (var j = 0; j < randomSequence.length; j++) {
    var x = '';
    switch (NAMES[randomSequence[j]]) {
        case 'Zarya':
            x = NAMES[randomSequence[j]];

            break;
        case 'Inna':
            x = NAMES[randomSequence[j]];

            break;
        case 'Antoniya':
            x = NAMES[randomSequence[j]];
            break;
        case 'Filippa':
            x = NAMES[randomSequence[j]];
            break;
        case 'Irina':
            x = NAMES[randomSequence[j]];
            break;
        case 'Sevastian':
            x = NAMES[randomSequence[j]];
            break;
        case 'Arisha':
            x = NAMES[randomSequence[j]];
            break;
        case 'Dmitriy':
            x = NAMES[randomSequence[j]];
            break;
        case 'Vlad':
            x = NAMES[randomSequence[j]];
            break;
        case 'Mariya':
            x = NAMES[randomSequence[j]];
            break;
        case 'Svetlana':
            x = NAMES[randomSequence[j]];
            break;
        case 'Nastasya':
            x = NAMES[randomSequence[j]];
            break;
        case 'Yuliana':
            x = NAMES[randomSequence[j]];
            break;
        case 'Viktoriya':
            x = NAMES[randomSequence[j]];
            break;
        default:
            x = SET_DEFAULT_NAME;

    }
    counter[x]++;
}
console.timeEnd("switch");


counter = {
    Zarya: 0,
    Inna: 0,
    Antoniya: 0,
    Filippa: 0,
    Irina: 0,
    Sevastian: 0,
    Arisha: 0,
    Dmitriy: 0,
    Vlad: 0,
    Mariya: 0,
    Svetlana: 0,
    Nastasya: 0,
    Yuliana: 0,
    Viktoriya: 0,
    Elena: 0
};

console.time("constObject");
for (var j = 0; j < randomSequence.length; j++) {
    var x = '';
    x = SET_NAME[NAMES[randomSequence[j]]] || SET_DEFAULT_NAME;
    counter[x]++;

}
console.timeEnd("constObject");