Run results for: xhr json parse manual vs automatic

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser: Chrome 80

Operating system: Mac OS X 10.12.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
manual parse	516.6 Ops/sec
automatic parse	500.0 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();