Run results for: JSON parse inside eval

Run details:

User agent: Mozilla/5.0 (Android 15; Mobile; rv:143.0) Gecko/143.0 Firefox/143.0

Browser: Firefox Mobile 143

Operating system: Android

Device Platform: Mobile

Date tested: 6 months ago

Test name	Executions per second
direct eval	176.1 Ops/sec
eval + JSON parse	817.6 Ops/sec

Script Preparation code:

var jsonObj = (() => {
	let data = [];
	for (let i = 0; i < 10000; ++i) {
		data.push({k1: i, k2: i * 2, k3: i * 3});
	}
	return JSON.stringify(data);
})();
var code1 = "var res1 = " + jsonObj;
var code2 = "var res2 = JSON.parse(" + JSON.stringify(jsonObj) + ")";

Tests:

direct eval
eval(code1);
eval + JSON parse
eval(code2);

Run results for: JSON parse inside eval

direct eval

eval + JSON parse