Benchmark: Update data from Object (Spread vs. Object.assign) 12312

Tests:

Update Object with Object.assign
const imutableObject = { name: 'David Walsh', age: 33, role: "Developer", status: "active", isLoading: true, isLoading1: true, isLoading2: true, isLoading3: true, isLoading4: true, isLoading5: true, isLoading6: true, isLoading7: true }; const newObject = Object.assign({}, imutableObject, {status: "inactive"});
Update Object with Spread Operator
const imutableObject = { name: 'David Walsh', age: 33, role: "Developer", status: "active", isLoading: true, isLoading1: true, isLoading2: true, isLoading3: true, isLoading4: true, isLoading5: true, isLoading6: true, isLoading7: true }; const newObject = {...imutableObject, status: "inactive"};

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Update Object with Object.assign
Update Object with 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 benchmark definition and test cases.

**Benchmark Definition JSON**

The provided JSON represents a benchmark that tests two different approaches to updating an object in JavaScript:

* `Object.assign` (also known as the "shallow copy" method)
* Spread Operator (`{...}`)

This benchmark aims to measure which approach is faster, more efficient, or has better performance characteristics.

**Options Compared**

The options being compared are:

1. **Object.assign**: A built-in JavaScript function that creates a shallow copy of an object and assigns values from another object to it.
2. **Spread Operator (`{...}`)**: A syntax feature introduced in ECMAScript 2018 (ES2018) that allows you to create a new object by spreading the properties of an existing object into a new object.

**Pros and Cons**

Here's a brief overview of each approach:

* **Object.assign**:
	+ Pros: Widely supported, well-documented, and easily readable.
	+ Cons: Can be slower than spread operator due to its method call overhead. May not work as expected with nested objects or arrays.
* **Spread Operator (`{...}`)**:
	+ Pros: Faster, more concise, and easier to read than `Object.assign`. Works well with nested objects and arrays.
	+ Cons: Less widely supported (before ES2018), may require more modern JavaScript versions.

**Library/Function**

None of the test cases use any external libraries or functions other than built-in JavaScript features. Both `Object.assign` and spread operator rely solely on native JavaScript syntax.

**Special JS Feature/Syntax**

The test case uses the **Spread Operator (`{...}`)**, which is a relatively new feature introduced in ECMAScript 2018 (ES2018). If your target audience consists of developers using older JavaScript versions, you may want to consider using `Object.assign` instead.

**Other Alternatives**

If you'd like to explore other approaches or variations on this benchmark, consider the following options:

* **Object.create()**: Another way to create a shallow copy of an object.
* **Array.prototype.slice() + Object.assign()**: A possible optimization for large objects by breaking them down into smaller arrays and then using `Object.assign()` to update them.
* **Library-based implementations**: Some libraries, like Lodash or Immutable.js, provide optimized versions of these operations that may outperform the built-in JavaScript functions.

Keep in mind that the choice of alternative will depend on your specific use case, target audience, and performance requirements.

Related benchmarks:

Update data from Object (Spread vs. Object.assign) 12312 (version: 0)

Comparing performance of: Update Object with Object.assign vs Update Object with Spread Operator

Created: 6 years ago by: Guest

Jump to the latest result

Update Object with Object.assign

Update Object with 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):