Benchmark: Fastest way to check if object is empty - EP3

Script Preparation code:

var xxx = {}

Tests:

object.keys()
Object.keys(xxx) === 0
object.values()
Object.values(xxx) === 0
JSON.stringify()
JSON.stringify(xxx) === "{}"

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object.keys()
object.values()
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/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.15

Browser/OS: Safari 18 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
object.keys()	136856944.0 Ops/sec
object.values()	50887124.0 Ops/sec
JSON.stringify()	36936192.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'll explain the benchmark and provide insights on the options being compared.

**Benchmark Purpose:**
The goal of this benchmark is to determine the fastest way to check if an object is empty, specifically using the `object.keys()`, `object.values()`, and `JSON.stringify()` methods.

**Options Being Compared:**

1. **Object.keys()**: This method returns an array of a given object's own enumerable property names. To check if an object is empty, we can simply compare the length of this array to 0.
2. **Object.values()**: This method returns an array containing the values of all enumerable properties in an object. Similar to `object.keys()`, we can compare the length of this array to 0 to determine if the object is empty.
3. **JSON.stringify()**: In JavaScript, `JSON.stringify()` can be used to convert an object into a JSON string, which can help us verify if the object is empty.

**Pros and Cons:**

*   **Object.keys()**: This method is simple and widely supported. However, it may have performance implications when dealing with large objects or arrays.
*   **Object.values()**: Similar to `object.keys()`, this method is also straightforward but might be slightly slower due to the additional overhead of accessing property values.
*   **JSON.stringify()**: While this method can be useful for verifying an object's contents, it may not be the most efficient way to check if an object is empty, especially when dealing with large objects. Additionally, `JSON.stringify()` can throw errors if the object contains circular references or other invalid data.

**Library Usage:**
In this benchmark, no external libraries are being used beyond built-in JavaScript methods. However, it's worth noting that some browsers might have additional APIs or modules that could potentially provide faster or more efficient ways to check for empty objects.

**Special JS Feature or Syntax:**
There is no special feature or syntax mentioned in the provided code snippet. The focus is on understanding how different methods can be used to achieve a common goal – verifying an object's emptiness.

**Alternatives:**
If you're looking for alternative approaches, consider the following:

*   **Using `Object.size`**: In some browsers, like Firefox and Edge, you can use the `Object.size` method (available via the `@babel/polyfill` library) to get the size of an object. This method might be faster than directly comparing the length of an array or object.
*   **Utilizing WebAssembly (WASM)**: If you're targeting a specific browser and need extremely high performance, considering WASM might be a viable option. However, this would require setting up a WASM runtime and modifying your test setup accordingly.

**Additional Considerations:**
When working with benchmarks like MeasureThat.net, consider the following factors to ensure accurate results:

*   **Test Setup**: Ensure that your test environment is consistent across different browsers or devices.
*   **Browser Interactions**: Be aware of how browser interactions (like page loading, resource loading, etc.) might affect benchmark performance.
*   **Multi-Threading or Multi-Processing**: If you're running multiple tests concurrently, consider the implications on parallelism and potential impact on results.

I hope this explanation helps software engineers understand what's being tested in the provided benchmark.

Related benchmarks:

Fastest way to check if object is empty - EP3 (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 object.values() vs JSON.stringify()

Created: 2 years ago by: Guest

Jump to the latest result

object.keys()

object.values()

JSON.stringify()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):