Benchmark: Object.assign vs spread operator test

Tests:

Object.assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({ a: 2 }, params);
spread operator
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.assign
spread operator

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided JSON data for the Object.assign vs spread operator test benchmark on MeasureThat.net.

**What is tested:**

The benchmark compares the performance of two approaches:

1. `Object.assign()`: A method in JavaScript that allows you to copy properties from one or more source objects into a new object.
2. Spread Operator (`{ ... }`): A syntax feature introduced in ECMAScript 2015 (ES6) that allows you to create a new object by copying the key-value pairs from an existing object.

**Options compared:**

The benchmark compares the performance of these two approaches on a specific test case:

* `var params = { b:\"hello\", c: true, d:7 };`
* `Object.assign({ a: 2 }, params);` (using `Object.assign()`)
* `{ a: 2, ...params };` (using Spread Operator)

**Pros and Cons of each approach:**

1. **Object.assign()**
	* Pros:
		+ Widely supported in older browsers and JavaScript engines.
		+ More flexible when dealing with nested objects or arrays.
	* Cons:
		+ Can be slower due to the overhead of creating a new object and iterating over properties.
2. **Spread Operator**
	* Pros:
		+ More concise and readable syntax.
		+ Faster performance compared to `Object.assign()` in modern JavaScript engines.
	* Cons:
		+ Not supported in older browsers or JavaScript engines.

**Library:**

None, as this is a native JavaScript benchmark.

**Special JS feature:**

The spread operator (`{ ... }`) is a new syntax feature introduced in ECMAScript 2015 (ES6). While not essential for the benchmark's functionality, it highlights the evolving nature of JavaScript and its ongoing support for new features.

**Other alternatives:**

In this case, there are no other alternatives presented as test cases. However, if you were to consider additional approaches, you might include:

* Using `Object.create()` to create a new object.
* Implementing a custom cloning function using recursion or iteration.
* Utilizing a library like Lodash's `cloneDeep` method.

**Benchmark preparation code:**

The provided Script Preparation Code is empty, indicating that the benchmark script will be generated automatically by MeasureThat.net. The Html Preparation Code is also empty, suggesting that the HTML template for displaying the benchmark results will be provided by MeasureThat.net as well.

Overall, this benchmark allows users to compare the performance of `Object.assign()` and the Spread Operator in a controlled environment, providing insights into the trade-offs between these two approaches in terms of speed and readability.

Related benchmarks:

Object.assign vs spread operator test (version: 0)

Comparing performance of: Object.assign vs spread operator

Created: 6 years ago by: Guest

Jump to the latest result

Object.assign

spread operator

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):