Run results for: Url parameters to object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:83.0) Gecko/20100101 Firefox/83.0

Browser: Firefox 83

Operating system: Mac OS X 10.16

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Object.entries with URLSearchParams	11735.5 Ops/sec
map reduce	25921.8 Ops/sec
json parse decodeURI	35750.8 Ops/sec
json parse decodeURIComponent	22130.3 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) })