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Fastest way to check if object is empty using length
(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()
Created:
one year ago
by:
Guest
Go to the latest result
Script Preparation code:
var xxx = {}
Tests:
object.keys()
Object.keys(xxx).length === 0
JSON.stringify()
JSON.stringify(xxx) === "{}"
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
object.keys()
JSON.stringify()
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Browser/OS:
Chrome 129 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=558669" width="100%" height="500px"></iframe>
object.keys()
10.1M/s
JSON.stringify()
7.9M/s
View exact numbers
Test name
Executions per second
✓
object.keys()
10,094,086 Ops/sec
JSON.stringify()
7,861,430 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition** The benchmark is designed to measure which method is the fastest way to check if an object is empty using JavaScript. **Options Compared** There are two options compared: 1. `object.keys(xxx).length === 0` 2. `JSON.stringify(xxx) === "{}"` **Pros and Cons of Each Approach** 1. **Using `object.keys()`** * Pros: + This method is concise and easy to read. + It directly checks the length of the object's keys, which implies an empty object has no keys. * Cons: + Some older browsers may have issues with this approach due to their internal implementation details. 2. **Using `JSON.stringify()`** * Pros: + This method is widely supported across different browsers and versions. + It serializes the entire object, which can be useful for other checks (e.g., checking if an object has a specific property). * Cons: + This method can be slower than using `object.keys()` due to the overhead of stringification. **Library: None** There are no external libraries used in this benchmark. The tests rely solely on built-in JavaScript methods and properties. **Special JS Features/Syntax** None mentioned. Both test cases use standard JavaScript features (objects, keys, stringification). **Other Alternatives** If you're interested in exploring alternative approaches, here are a few: * Using `Object.isEmpty()` or `Object.keys(xxx).length > 0`: These methods are not part of the ECMAScript standard and may not be supported by older browsers. However, they can provide a more explicit way to check for an empty object. * Using a library like Lodash: If you need additional utility functions for working with objects, Lodash provides `isEmpty()` which is similar to the first alternative mentioned above. Keep in mind that these alternatives may not be as widely supported or performant as the original benchmark options.
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