Run results for: Url parameters to object

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:120.0) Gecko/120.0 Firefox/120.0

Browser: Firefox Mobile 120

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Object.entries with URLSearchParams	110637.1 Ops/sec
map reduce	480577.1 Ops/sec
json parse decodeURI	334323.8 Ops/sec
json parse decodeURIComponent	218704.7 Ops/sec

Script Preparation code:

var query = 'test=1&test=2&alt=test&b=8&c=9&alt=9';

Tests:

Object.entries with URLSearchParams
var result = Object.fromEntries(new URLSearchParams(query));
map reduce
var result = query.split('&') .map(p => p.split('=')) .reduce((obj, pair) => { const [key, value] = pair.map(decodeURIComponent); obj[key] = value; return obj; }, {});
json parse decodeURI
var result = JSON.parse('{"' + decodeURI(query).replace(/"/g, '\\"').replace(/&/g, '","').replace(/=/g,'":"') + '"}')
json parse decodeURIComponent
var result = JSON.parse('{"' + query.replace(/&/g, '","').replace(/=/g,'":"') + '"}', function(key, value) { return key===""?value:decodeURIComponent(value) })