MeasureThat.net

Run results for: Map key access vs array find

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Run details:
Mozilla/5.0 (Android 12; Mobile; rv:109.0) Gecko/112.0 Firefox/112.0
Firefox Mobile 112
Android
Mobile
2 years ago
Test name Executions per second
Array find 1955.1 Ops/sec
Map access 25895.9 Ops/sec
Script Preparation code:
​x
 
var items = Array.from(Array(1000), (_,x) => ({key: x, value: x*10}));
​
var objContainer = new Map();
var arrContainer = [];
​
for (let i = 100; i >= 0; i--) {
  const index = Math.floor(Math.random() * 1000);
  const item = items[index];
  objContainer.set(item.key,item);
  arrContainer.push(item)
}
Tests:

  • Array find

     
    items.forEach(item => arrContainer.find(containerItem => containerItem.value === item.value))

  • Map access

     
    items.forEach(item => objContainer.get(item.value))