Benchmark: Object Destruct vs Object.assign

Tests:

object destruct
const a = { hello: "world", world: "hello" }; const b = {...a, right: "wrong", wrong: "right"};
Object.assign
const a = { hello: "world", world: "hello" }; const b = Object.assign(a, {right: "wrong", wrong: "right"});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object destruct
Object.assign

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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**Benchmark Overview**

The provided benchmark compares the performance of two approaches for object modification in JavaScript: Object Destruct (also known as Object Spread Operator) and `Object.assign()`. The benchmark is designed to measure which approach is faster, more efficient, or scalable.

**Options Compared**

There are two options being compared:

1. **Object Destruct (Spread Operator)**: This method uses the spread operator (`...`) to create a new object by copying all the properties from an existing object `a` and then adding or overriding one or more properties.
2. **`Object.assign()`**: This method takes multiple source objects and merges them into a single destination object.

**Pros and Cons**

* **Object Destruct (Spread Operator)**:
	+ Pros: concise syntax, easy to read, and write, as it uses a familiar operator.
	+ Cons: may have performance overhead due to the creation of a new object, which can lead to memory allocation and garbage collection issues in some browsers.
* `Object.assign()`:
	+ Pros: more explicit and controlled way of merging objects, allows for better error handling and debugging.
	+ Cons: less concise syntax, which can make it harder to read and write.

**Library and Purpose**

Neither of the options relies on a specific library. The Object Destruct approach is built into JavaScript, while `Object.assign()` is also a native method.

**Special JS Feature/Syntax (None)**

There are no special features or syntax used in this benchmark.

**Other Considerations**

The performance difference between these two approaches may vary depending on the specific use case, data structure, and browser implementation. In general:

* For small objects with few properties, Object Destruct might have a slight performance advantage.
* For larger objects or complex data structures, `Object.assign()` might be more efficient due to its ability to handle more complex merges.

**Alternatives**

Other alternatives for object modification in JavaScript include:

1. **`Array.prototype.slice()` and `Array.prototype.concat()`**: While not as convenient as Object Destruct or `Object.assign()`, these methods can also be used to create new objects by modifying arrays.
2. **Third-party libraries like Lodash or Immutable.js**: These libraries provide additional functionality for working with objects, including merging and combining data.

Keep in mind that the best approach depends on your specific use case and requirements. If you need a simple, concise way to merge objects, Object Destruct might be sufficient. However, if you require more control over the merge process or need to handle complex data structures, `Object.assign()` or other libraries might be a better choice.

Related benchmarks:

Object Destruct vs Object.assign (version: 0)

Comparing performance of: object destruct vs Object.assign

Created: 5 years ago by: Guest

Jump to the latest result

object destruct

Object.assign

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):