Run results for: xhr json parse manual vs automatic

Run details:

User agent: Mozilla/5.0 (Linux; Android 6.0.1; HUAWEI VNS-L62) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.115 Mobile Safari/537.36

Browser: Chrome Mobile 92

Operating system: Android 6.0.1

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
manual parse	348.7 Ops/sec
automatic parse	379.4 Ops/sec

Script Preparation code:

function showResult(data) {
    console.log(data);
}
var newUrl = "https://www.googleapis.com/discovery/v1/apis";

Tests:

manual parse
var xhr = new XMLHttpRequest(); xhr.onload = data => showResult(JSON.parse(xhr.responseText)); xhr.open('GET', newUrl, true); xhr.send();
automatic parse
var xhr = new XMLHttpRequest(); xhr.responseType = 'json'; xhr.onload = data => showResult(xhr.response); xhr.open('GET', newUrl, true); xhr.send();