Benchmark: Spread vs direct Object assignment V3

Script Preparation code:

window.direct = (targets, params = {}) => {
  params.targets = targets;
  return params;
}

window.spread = (targets, params = {}) => {
  return {targets, ...params};
}

Tests:

direct
direct('target', { p1: 1, p2: 2, p3: 3, p4: 4, p5: 5, p6: 6, p7: 7, p8: 8, p9: 9, p10: 10, p11: 11, p12: 12, p13: 13, p14: 14, p15: 15, p16: 16, })
spread
spread('target', { p1: 1, p2: 2, p3: 3, p4: 4, p5: 5, p6: 6, p7: 7, p8: 8, p9: 9, p10: 10, p11: 11, p12: 12, p13: 13, p14: 14, p15: 15, p16: 16, })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
direct
spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

**What is tested in the provided JSON?**

The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net. The benchmark compares two approaches for assigning properties to an object: using the `direct` method and using the spread operator (`...`).

**Options compared:**

1. **Direct Object Assignment**: This approach uses the `window.direct` function, which takes an object with target properties as an argument. It creates a new object with the same target properties.
2. **Spread Operator**: This approach uses the spread operator (`...`) to create a new object with the target properties.

**Pros and Cons of each approach:**

* **Direct Object Assignment**:
	+ Pros:
		- Can be more efficient for large numbers of properties, as it avoids creating an intermediate object.
		- Can be more readable for simple cases.
	+ Cons:
		- Requires explicit property names, which can lead to errors if the wrong property name is used.
		- May have performance overhead due to function call and property lookup.
* **Spread Operator**:
	+ Pros:
		- More concise and readable than direct assignment.
		- Easier to avoid errors due to implicit property creation.
	+ Cons:
		- Can lead to performance issues if the target object is large or has many properties, as it creates an intermediate object.

**Library:**

There is no explicit library used in this benchmark. However, `window.direct` and the spread operator are part of the JavaScript standard library.

**Special JS feature or syntax:**

The benchmark uses the spread operator (`...`) which is a relatively modern feature introduced in ECMAScript 2018 (ES2018). This feature allows for concise object creation and assignment using the syntax `objectName = { key1: value1, key2: value2 };` instead of `objectName.key1 = value1; objectName.key2 = value2;`.

**Other alternatives:**

There are alternative approaches to these two methods:

* Instead of direct assignment or spread operator, you can use `Object.assign()` method to assign properties to an object. This approach is more explicit and avoids potential issues with property naming.
* For large datasets, you can consider using `Array.from()` and `reduce()` methods to create objects in a more memory-efficient manner.

**Benchmark preparation code:**

The provided JSON includes the script preparation code for the benchmark:
```javascript
window.direct = (targets, params = {}) => {
  params.targets = targets;
  return params;
}

window.spread = (targets, params = {}) => {
  return { targets, ...params };
}
```
This code defines two functions: `direct` and `spread`, which are used to assign properties to objects using the respective methods.

**Individual test cases:**

The provided JSON includes two individual test cases:

1. "direct" - Tests the direct object assignment method.
2. "spread" - Tests the spread operator method.

Each test case has a unique name, and their benchmarking results are stored in separate objects. The latest benchmark result shows that the `direct` approach performed better than the `spread` approach for this specific use case.

Related benchmarks:

Spread vs direct Object assignment V3 (version: 2)

Comparing performance of: direct vs spread

Created: 3 years ago by: Registered User

Jump to the latest result

direct

spread

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):