Run results for: Array HashMap comparison

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.1.0; ZC554KL) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.93 Mobile Safari/537.36

Browser: Chrome Mobile 79

Operating system: Android 8.1.0

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
HashMap#in	1044781.0 Ops/sec
HashMap#property	1046405.0 Ops/sec
HashMap#hasOwnProperty	904220.7 Ops/sec
Array#includes	1157305.0 Ops/sec
Array#indexOf	154082.8 Ops/sec

Script Preparation code:

const long_text = "the the the the the Ladies others the six desire age. Bred am soon park past read by lain. As excuse eldest no moment. An delight beloved up garrets am cottage private. The far attachment discovered celebrated decisively surrounded for and. Sir new the particular frequently \
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assistance me especially. For looking two cousins regular amongst. \
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const words = long_text.split(/\s+/);
var array = [];
var hashMap = {};
for (let word of words) {
  array.push(word);
  hashMap[word]= (hashMap[word] || 0) + 1;
}

Tests:

HashMap#in
const result = 'Impression' in hashMap;
HashMap#property
const result = hashMap.Impression;
HashMap#hasOwnProperty
const result = hashMap.hasOwnProperty('Impression');
Array#includes
const result = array.includes('Impression');
Array#indexOf
const result = array.indexOf('Impression') !== -1;

Run results for: Array HashMap comparison

HashMap#in

HashMap#property

HashMap#hasOwnProperty

Array#includes

Array#indexOf