Run results for: jQuery AJAX vs Fetch API

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
jQuery test case	36101.7 Ops/sec
Vanilla JS test case	125720.0 Ops/sec

HTML Preparation code:

<script src='https://code.jquery.com/jquery-3.6.0.min.js'></script>

Tests:

jQuery test case
$.ajax({ type: 'POST', url: "http://vanilla-js.com/path/to/api", data: {'banana': 'yellow'}, success: (data) = {}, });
Vanilla JS test case
const sendAjax = (url, data, callback) => { fetch(url, { method: 'POST', body: new URLSearchParams(data), }).then((response) => { const contentType = response.headers.get("content-type"); if (contentType && contentType.indexOf("application/json") !== -1) { return response.json().then(data => {callback(data)}); } else { return response.text().then(text => {callback(text)}); } }); } sendAjax('http://vanilla-js.com/path/to/api', {'banana': 'yellow'}, (data) => {});