Benchmark: Object.assign vs spread operator 222

Tests:

Object.assign
var params = { b:"hello", c: true, d:7, e:123, f:"ad", g:24523, ghfhdjhfkhsdkfsdf:123123, jkihdfjhsadfkj:09874356, sdjkhgvsdajf: 12332, fyutqqq: 54356 }; var other = Object.assign({}, params);
spread operator
var params = { b:"hello", c: true, d:7, e:123, f:"ad", g:24523, ghfhdjhfkhsdkfsdf:123123, jkihdfjhsadfkj:09874356, sdjkhgvsdajf: 12332, fyutqqq: 54356 }; var other = { ...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 llama3.2:3b, generated one year ago):

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Let's break down the benchmark and its options.

**What is tested?**

The provided JSON represents a JavaScript microbenchmark that compares two approaches for merging objects: `Object.assign` and the spread operator (`{ ...params }`). The test aims to determine which approach is faster in terms of execution time.

**Options compared**

There are only two options being compared:

1. **`Object.assign`**: This method creates a new object and copies all enumerable own properties from one or more source objects into a new object. It's an older way of merging objects.
2. **Spread operator (`{ ...params }`)**: This is a newer syntax introduced in ECMAScript 2018, which allows creating a new object with the same properties as an existing object (in this case, `params`). It's a more concise and readable way to merge objects.

**Pros and cons of each approach**

1. **`Object.assign`**:
	* Pros: Wide browser support, easy to use.
	* Cons: Can be slower due to the overhead of creating a new object.
2. **Spread operator (`{ ...params }`)**:
	* Pros: Faster execution time, more readable code, and less overhead than `Object.assign`.
	* Cons: Requires modern browsers that support ECMAScript 2018 (or later).

**Library or framework**

In this benchmark, there is no specific library or framework being used. The tests are self-contained JavaScript functions.

**Special JS features or syntax**

The benchmark uses the spread operator (`{ ...params }`), which is a feature introduced in ECMAScript 2018. This means that older browsers may not support it.

**Other alternatives**

For merging objects, you might also consider using other approaches like:

1. **Array methods**: You can use `Object.assign()` with an array of key-value pairs or with the spread operator (`{ ...params }`).
2. **Function-based approach**: Create a function that merges two objects based on shared keys.
3. **JSON merge libraries**: There are libraries available, like `json-merge`, that provide a more comprehensive solution for merging JSON objects.

In summary, this benchmark compares two ways of merging objects in JavaScript: using the older `Object.assign()` method versus the newer spread operator (`{ ...params }`). The test aims to determine which approach is faster and more efficient.

Related benchmarks:

Object.assign vs spread operator 222 (version: 0)

Comparing performance of: Object.assign vs spread operator

Created: 5 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):