Run results for: Dict vs. Map

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Dictionary	184324.2 Ops/sec
Map	186131.7 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);
}

Tests:

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

Run results for: Dict vs. Map

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

Dictionary

Map