Benchmark: JSON parse inside eval

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
direct eval
eval + JSON parse

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 months ago)

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

Browser/OS: Firefox Mobile 143 on Android

View result in a separate tab

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

Related benchmarks:

eval vs new Function 2
Object.assign vs JSON Clone
JSON.stringify vs structuredClone
TestDeepCopy1
Test of JSON Stringify vs. structuredClone
JSON.parse vs structuredClone
JSON.stringify vs structuredClone, modifications
JSON.parse vs JSON.stringify 2
eval vs json parse (working) real

JSON parse inside eval (version: 1)

Comparing performance of: direct eval vs eval + JSON parse

Created: 6 months ago by: Guest

Jump to the latest result

direct eval

eval + JSON parse

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A