Run results for: Url parameters to object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
Object.entries with URLSearchParams	279276.1 Ops/sec
map reduce	812633.1 Ops/sec
json parse decodeURI	860334.9 Ops/sec
json parse decodeURIComponent	443347.0 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) })