Benchmark: Testytesty2 - MeasureThat.net

Script Preparation code:

var obj = { id: "foo" }

Tests:

Object.assign
let newObj = Object.assign({ value: "val"},obj)
simple assign
obj.value = "val"

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.assign
simple assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser/OS: Chrome 71 on Mac OS X 10.14.2

View result in a separate tab

Test name	Executions per second
Object.assign	3288223.0 Ops/sec
simple assign	12911071.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark data and explain what is being tested.

**Benchmark Overview**

The test creates two JavaScript microbenchmarks to measure the performance of simple assignment operations:

1. **`Object.assign()`**: This benchmark tests the performance of using the `Object.assign()` method to create a new object by copying an existing object's properties.
2. **Simple Assignment (`obj.value = "val"`)**: This benchmark measures the performance of assigning a value directly to a property of an existing object.

**Script Preparation Code**

The script preparation code is:
```javascript
var obj = { id: "foo" };
```
This creates a simple JavaScript object with an `id` property, which will be used as a reference point for both benchmarks.

**Html Preparation Code**

There is no HTML preparation code provided, indicating that this benchmark does not rely on any specific HTML structure or content.

**Options Compared**

Both benchmarks are testing different ways of assigning values to properties:

* **`Object.assign()`**: This method creates a new object by copying the existing `obj` object's properties. The benchmark measures how long it takes to execute this operation.
* **Simple Assignment (`obj.value = "val"`)**: This approach directly assigns a value to an existing property of the `obj` object. The benchmark tests how fast this assignment can be performed.

**Pros and Cons**

Here are some pros and cons for each approach:

* **`Object.assign()`**: Pros:
	+ Provides a way to create a new object with multiple properties in a single step.
	+ Can handle complex objects with nested properties.
	+ Is generally considered a safe and efficient way to create new objects.
* Cons:
	+ Requires the `Object.assign()` method to be supported by the browser (not all browsers support it).
* **Simple Assignment (`obj.value = "val"`)**: Pros:
	+ Fast and simple assignment of a single value.
	+ Does not require any additional methods or libraries.
* Cons:
	+ Only works for direct property assignments, not object properties with nested values.
	+ May be slower than `Object.assign()` if the assignment involves multiple properties.

**Library Usage**

In this benchmark, no external library is used.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax being tested in this benchmark. The tests focus on simple assignment operations and object creation.

**Alternatives**

Other alternatives for measuring the performance of simple assignments could include:

* Using a library like Lodash, which provides a `cloneDeep()` method that can be used to create a deep copy of an object.
* Implementing a custom object cloning algorithm using JavaScript's built-in methods (e.g., `JSON.parse()`, `String.prototype.replace()`).
* Measuring the performance of other assignment patterns, such as assigning properties to an existing object using dot notation (`obj.property = value`) or bracket notation (`obj["property"] = value`).

Keep in mind that these alternatives might introduce additional complexity and may not accurately represent the real-world use cases for simple assignment operations.

Related benchmarks:

Testytesty2 (version: 0)

Comparing performance of: Object.assign vs simple assign

Created: 5 years ago by: Guest

Jump to the latest result

Object.assign

simple assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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