Benchmark: quick speed test for merging

Tests:

reduce
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 10).reduce((acc, num) => { acc[num] = num; return acc }, {})
object.assign
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } Object.assign({}, range(0,10).map(num => ({[num]: num})))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce
object.assign

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark measures the performance of two JavaScript operations: using `Array.prototype.reduce()` and using `Object.assign()`. The benchmark is designed to test which method is faster when merging an array with key-value pairs.

**Benchmark Definition JSON Analysis**

The JSON definition contains the following information:

* **Name**: A descriptive name for the benchmark.
* **Description**: An empty string, indicating that no description is provided.
* **Script Preparation Code**: No code is specified, meaning the script will be executed directly in the benchmark.
* **Html Preparation Code**: No code is specified, meaning no HTML preparation is required.

**Individual Test Cases**

There are two test cases:

1. **"reduce"`:
	* The `Benchmark Definition` includes a JavaScript function `range` that generates an array from 0 to 10. This array is then passed to the `Array.prototype.reduce()` method.
2. **"object.assign"`**:
	* The `Benchmark Definition` includes a JavaScript function `range` (the same as in the first test case) and uses the `Object.assign()` method to merge an object with key-value pairs generated from the array.

**Comparison of Options**

The two methods are compared:

1. **Using `Array.prototype.reduce()`**:
	* Pros: Efficiently merging an array with key-value pairs by iterating over the array once.
	* Cons: May not be suitable for large arrays, as it requires a lot of memory to store the accumulator object.
2. **Using `Object.assign()`**:
	* Pros: Suitable for large arrays, as it uses a more efficient algorithm that creates new objects instead of modifying existing ones.
	* Cons: Requires creating an intermediate array with key-value pairs, which can be slower than using `reduce()`.

**Library Usage**

Neither test case explicitly uses any external libraries. However, it's worth noting that both methods rely on the built-in JavaScript functions and data structures.

**Special JS Feature or Syntax (None)**

There are no special features or syntax used in these benchmark definitions.

**Other Considerations**

* **Array size**: The benchmark measures performance for an array of 10 elements. Increasing the array size could affect the results, as `reduce()` might become slower due to increased memory usage.
* **Browser and device differences**: The benchmark result shows data from a single browser (Chrome 83) on a Linux desktop. Results may vary across different browsers, devices, and platforms.

**Alternatives**

If you were to implement this benchmark or create similar ones:

* You could explore using other methods for merging arrays with key-value pairs, such as `Array.prototype.forEach()` or a custom implementation.
* Consider adding more test cases with varying array sizes to better understand the performance trade-offs between these methods.
* If optimizing for performance, you might also look into using techniques like parallel processing or caching to reduce execution time.

Related benchmarks:

quick speed test for merging (version: 0)

Comparing performance of: reduce vs object.assign

Created: 5 years ago by: Guest

Jump to the latest result

reduce

object.assign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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