Benchmark: Fastest way to check if object is empty2

Script Preparation code:

var xxx = {}
var yyy = {};
for (let i = 0; i < 10; ++i) {
  yyy[`key${i}`] = i;
}

function isEmpty(v) {
  for (const _ in xxx) { return false }
  return true;
}

Tests:

object.keys()
Object.keys(xxx) === 0 Object.keys(yyy) === 0
JSON.stringify()
JSON.stringify(xxx) === "{}" JSON.stringify(yyy) === "{}"
for in
isEmpty(xxx); isEmpty(yyy);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object.keys()
JSON.stringify()
for in

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
object.keys()	3794875.0 Ops/sec
JSON.stringify()	1298411.0 Ops/sec
for in	3688980.0 Ops/sec

Fastest way to check if object is empty2 (version: 0)

You don't need to make add for loops in your test scenarios, the benchmark does it itself.

Comparing performance of: object.keys() vs JSON.stringify() vs for in

Created: one year ago by: Guest

Jump to the latest result

object.keys()

JSON.stringify()

for in

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A