Benchmark: Test validation - MeasureThat.net

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const obj = {
 mr: 1,
  ml: 1
  p: 1
}

Tests:

keys
const obj = { mr: 1, ml: 1, p: 1 } Object.keys(obj).length > 0
test2
const obj = { mr: 1, ml: 1, p: 1 } const isEmpty = (value) => { if(!value) { return true; } for (const key in value) { if (Object.hasOwn(value, key)) { return false; } } return true; } isEmpty(obj)

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

keys

121.5M/s

test2

93.7M/s

Fastest: keys (1.3x faster)

View exact numbers

✓ keys: 121,532,584 ops/sec
• test2: 93,719,304 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
keys
test2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser/OS: Chrome 141 on Mac OS X 10.15.7

View result in a separate tab

keys

123.4M/s

test2

95.5M/s

View exact numbers

Test name	Executions per second
✓ keys	123,385,504 Ops/sec
test2	95,453,680 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 9 months ago):

LLMs can make mistakes. Check important info.

### Benchmark Overview

The benchmark tests the performance of two different methods to determine whether an object is empty in JavaScript. The tests utilize the built-in Object method and a custom function to compare their execution speeds.

### Test Cases Explained

1. **Test Case: `keys`**
   - **Benchmark Definition**: This test evaluates the expression checking if the number of keys in an object is greater than zero using `Object.keys(obj).length > 0`.
   - **Functionality**: 
     - `Object.keys(obj)` retrieves an array of a given object's own enumerable property names (keys).
     - The length of that array is checked to determine if the object contains any properties.
   
2. **Test Case: `test2`**
   - **Benchmark Definition**: This test assesses the performance of a custom function `isEmpty` to check if the object is empty. It does so by iterating over the object's keys and returning `false` if any key is found.
   - **Functionality**:
     - The function first checks if the value is falsy (which handles cases like null or undefined).
     - It uses a `for...in` loop to iterate over the object's properties, checking with `Object.hasOwn(value, key)` (which checks if the property belongs to the object and is not inherited).
     - If any keys are found, it returns `false`, otherwise, it returns `true` indicating that the object is empty.

### Performance Results

- **Executions Per Second**:
  - The `keys` test achieved approximately **102,780,072** executions per second, making it significantly faster in this test.
  - The `test2` function yielded about **80,925,552** executions per second, which is slower compared to the `keys` method.

### Pros and Cons

#### Using `Object.keys()` Method (Test Case `keys`)
- **Pros**:
  - Simplicity: Easy to read and understand.
  - Performance: Demonstrated faster execution in the benchmark.
  - Directly retrieves the keys without additional iterations.
  
- **Cons**:
  - May not handle scenarios where the object has properties that are not enumerable; however, this is not a frequent concern for determining "emptiness."

#### Using Custom `isEmpty` Function (Test Case `test2`)
- **Pros**:
  - Allows for custom logic if further checks are needed (e.g., considering inherited properties).
  - Can be modified to include more complex checks for defining "emptiness."

- **Cons**:
  - Complexity: More code means it's less readable, especially for simpler cases.
  - Performance: Slower execution due to the overhead of the loop and condition checks.

### Other Considerations
- **Library Usage**: Neither of the test cases employs a specific library; they rely solely on standard JavaScript features.
- **Alternatives to Consider**:
  - **Lodash's `isEmpty` Function**: This utility library provides a well-tested `isEmpty` method that works seamlessly with various data types, though it comes with the overhead of adding a library dependency.
  - **ES6+ Prototypes**: One could opt to attach a method directly to the `Object.prototype`, but this is generally not recommended due to potential conflicts with existing properties and security issues.

### Conclusion
For the particular use case of checking if an object is empty, the `Object.keys()` method appears to be the more efficient and straightforward option based on the benchmark results. Depending on specific needs, complexities, or scenarios, the custom function could be beneficial but may incur performance costs.

Test validation (version: 1)

Comparing performance of: `keys vs test2`

Created: 9 months ago by: Guest

Go to the latest result

keys

test2

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 9 months ago):

Test validation (version: 1)

Comparing performance of: keys vs test2

Created: 9 months ago by: Guest

Go to the latest result

keys

test2

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 9 months ago):

Related benchmarks

Comparing performance of: `keys vs test2`