Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Fastest way to check if object is empty using length 2
(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 loop
Created:
one year ago
by:
Guest
Go to the latest result
Script Preparation code:
var xxx = {}
Tests:
object.keys()
Object.keys(xxx) === 0
JSON.stringify()
JSON.stringify(xxx) === "{}"
For loop
for (var key in xxx) { if (hasOwnProperty.call(value, key)) { return false; } }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
object.keys()
JSON.stringify()
For loop
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
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=558671" width="100%" height="500px"></iframe>
For loop
24.1M/s
object.keys()
10.2M/s
JSON.stringify()
8.2M/s
View exact numbers
Test name
Executions per second
✓
For loop
24,137,856 Ops/sec
object.keys()
10,189,637 Ops/sec
JSON.stringify()
8,160,203 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks and analyze the provided benchmark definition. **Benchmark Definition** The benchmark definition is a JSON object that contains the details of the test case. Here's what it tells us: * The test aims to find the fastest way to check if an object is empty using a length 2 approach. * The script preparation code is `var xxx = {}`, which creates an empty object named `xxx`. * There are three individual test cases: 1. `object.keys()`: Checks if the object has any keys using the `keys()` method. 2. `JSON.stringify(xxx) === "{}"`: Checks if the JSON string representation of the object is equal to `{}`. 3. `For loop`: Uses a for loop to check if the object has any properties. **Test Case Analysis** Let's analyze each test case: 1. **`object.keys()`**: This method returns an array of all the property names contained in the object. If the object is empty, it returns an empty array (`[]`). The benchmark measures how fast this method can check if the object has any keys. 2. **`JSON.stringify(xxx) === "{}",`**: JSON stringification creates a string representation of the object. If the object is empty, it should be equal to `{}`. The benchmark measures how fast this method can compare the JSON string with an empty string. 3. **`For loop`**: This test case uses a for loop to check if the object has any properties. It iterates over each property in the object and checks if the property is present using `hasOwnProperty.call(value, key)`. The benchmark measures how fast this method can iterate over the object's properties. **Library and Special JS Features** * None of the test cases use a specific JavaScript library. * There are no special JavaScript features or syntax used in these test cases. **Pros and Cons of Different Approaches** Here are some pros and cons of each approach: 1. **`object.keys()`**: * Pros: Fast, simple, and widely supported. * Cons: May not work correctly with objects that have non-enumerable properties. 2. **`JSON.stringify(xxx) === "{}",`**: * Pros: Works well with most objects, but can be slow for very large objects due to stringification overhead. * Cons: Not suitable for objects with non-serializable properties or large numbers of nested objects. 3. **`For loop`**: * Pros: Can handle complex object structures and non-enumerable properties. * Cons: May be slower than the other two approaches, especially for large objects. **Other Alternatives** Some alternative methods to check if an object is empty include: 1. `Object.keys(xxx).length === 0` (similar to `object.keys()`, but uses a direct property access) 2. `xxx.length === 0` (works well with objects, but may not work correctly with non-array-like objects) 3. `Object.getOwnPropertyNames(xxx).length === 0` (uses `getOwnPropertyNames()` to check for non-enumerable properties) These alternatives can be used as part of the benchmark to provide more comprehensive results. I hope this explanation helps you understand the JavaScript microbenchmark and its different test cases!
Related benchmarks
Fastest way to check if object is empty
Fastest way to check if object is empty (for in vs.
Fastest way to check if object is empty - EP3
Fastest way to check if object is empty using length
Fastest way to check if object is empty using length 3
Comments
Confirm delete:
Do you really want to delete benchmark?