Benchmark: Object.assign vs spread operator.

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

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Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

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This benchmark compares two ways to create a new object by combining existing properties:  `Object.assign()` and the spread syntax (`...`).

**Options Compared:**

* **`Object.assign()`:** This is a built-in JavaScript function that creates a new object by copying the values of all enumerable own properties from one or more source objects to a target object.
   *  Code Example: `Object.assign({ a: 2 }, { b: "hello", c: true, d: 7 });`

* **Spread Syntax (`...`):** Introduced in ES6, this syntax allows you to expand the contents of an iterable (like an object) into individual elements within another iterable.
   * Code Example: `{ a: 2, ...{ b: "hello", c: true, d: 7 } };`

**Pros/Cons:**

**Other Considerations:**

* **Performance:** In this specific benchmark, `Object.assign()` performs slightly better than the spread operator, but performance differences can vary depending on the size and complexity of the objects involved.
* **Flexibility:**  `Object.assign()` allows you to merge properties from multiple source objects into a single target object. The spread syntax is primarily used for expanding properties from a single object.

**Alternatives:**

While `Object.assign()` and the spread operator are common methods, there are other ways to achieve similar results in JavaScript:
* **Using property assignment (`{ ... }`):** Manually assigning properties one by one can be useful for specific control over which properties are copied.

Related benchmarks:

Object.assign vs spread operator. (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 gemma2:9b, generated one year ago):