Run results for: Dict vs. Map vs. Array

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:109.0) Gecko/115.0 Firefox/115.0

Browser: Firefox Mobile 115

Operating system: Android

Device Platform: Mobile

Date tested: 9 months ago

Test name	Executions per second
Dictionary	58496.9 Ops/sec
Array	316612.3 Ops/sec
Map	61570.6 Ops/sec

Script Preparation code:

var dict= {}
for (var i=0; i<50000; i++) {
  dict['abc_'+i] = i;
}

var map= new Map()
for (var i=0; i<50000; i++) {
  map.set('abc_'+i, i);
}

var arr = []
for (var i=0; i<50000; i++) {
  arr.push(i);
}

Tests:

Dictionary
let c = 0 for (i=2000; i<10000; i+=115) { c += dict['abc_'+i]}
Array
let c = 0 for (i=2000; i<10000; i+=115) { c += arr[i]}
Map
let c = 0 for (i=2000; i<10000; i+=115) { c += map.get('abc_'+i)}

Run results for: Dict vs. Map vs. Array

Large dictionary - how worse is it from array with direct reference? And how does Map perform?

Dictionary

Array

Map