Run results for: switch vs dictionary lookup

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Switch

81.8M/s

Dict

36.6M/s

View exact numbers

Test name	Executions per second
✓ Switch	81,806,504 Ops/sec
Dict	36,605,612 Ops/sec

Script Preparation code:

var getCursorClass = (state) => {
    switch (state) {
        case 'pending':
            return 'cursor-wait';
        case 'disabled':
            return 'cursor-not-allowed';
        default:
            return 'cursor-pointer';
    }
}

var cursorClassDict = {
    'pending': 'cursor-wait',
    'disabled': 'cursor-not-allowed',
    'default': 'cursor-pointer'
}
var states = ['pending','disabled', 'default'];

Tests:

Switch
const state = states[Math.floor(Math.random()*states.length)]; return getCursorClass(state)
Dict
const state = states[Math.floor(Math.random()*states.length)]; return cursorClassDict[state]

Run results for: switch vs dictionary lookup

Performance comparison between javascript switch and a dictionary lookup for a simple string return

Switch

Dict