Run results for: map vs if/else vs switch

Run details:

User agent: Mozilla/5.0 (Android 11; Mobile; rv:122.0) Gecko/122.0 Firefox/122.0

Browser: Firefox Mobile 122

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

switch case

43.2M/s

map lookup

29.9M/s

if/else

5.7M/s

View exact numbers

Test name	Executions per second
✓ switch case	43,243,952 Ops/sec
map lookup	29,860,140 Ops/sec
if/else	5,696,997 Ops/sec

Script Preparation code:

var map = new Map([
  [0, "Initializing"],
  [1, "Idle"],
  [2, "Running"],
  [3, "Stop"],
  [4, "Error"],
]);
function switchCase(value) {
  switch (value) {
    case 0: return "Initializing";
    case 1: return "Idle";
    case 2: return "Running";
    case 3: return "Stop";
    case 4: return "Error";
    default: return void 0;
  }
}
function ifElse(value) {
  if (value === 0) {
    return "Initializing";
  } else if (value === 1) {
    return "Idle";
  } else if (value === 2) {
    return "Running";
  } else if (value === 3) {
    return "Stop";
  } else if (value === 4) {
    return "Error";
  }
}

Tests:

map lookup
let value = map.get(0); value = map.get(32); value = map.get(1); value = map.get(33); value = map.get(2); value = map.get(34); value = map.get(3); value = map.get(35); value = map.get(4);
switch case
let value = switchCase(0); value = switchCase(32); value = switchCase(1); value = switchCase(33); value = switchCase(2); value = switchCase(34); value = switchCase(3); value = switchCase(35); value = switchCase(4);
if/else
let value = ifElse(0); value = ifElse(32); value = ifElse(1); value = ifElse(33); value = ifElse(2); value = ifElse(34); value = ifElse(3); value = ifElse(35); value = ifElse(4);