Benchmark: assign vs spread vs djuka vs marac

Tests:

assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign(params, { a: 2 });
spread
var params = { b:"hello", c: true, d:7 }; var other = { ...params, a: 2 };

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
assign
spread

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The provided benchmark measures the performance of three different methods for assigning properties to an object:

1. `Object.assign()`
2. Spread syntax (`{ ... }`)
3. DJuka (also known as "destructure assignment") (`var other = { ...params, a: 2 };`)

**Options Compared**

The two options being compared are:

A) Using the spread syntax (`{ ... }`) to create a new object with merged properties.

B) Using `Object.assign()` to merge properties into an existing object.

**Pros and Cons of Each Approach**

1. **Spread Syntax (A)**:
	* Pros: Simple, intuitive, and efficient.
	* Cons: May not be as widely supported in older browsers or versions of JavaScript.
2. **Object.assign() (B)**:
	* Pros: Widespread support, well-documented, and widely adopted.
	* Cons: Can be slower due to the overhead of function calls.

**Other Considerations**

* The benchmark uses a simple test case with only one property assignment (`a: 2`). In real-world scenarios, multiple properties are often assigned simultaneously, which can affect performance.
* The benchmark does not account for the order in which properties are assigned. In some cases, this might matter (e.g., when using `Object.assign()` with a large number of properties).

**Library/Functionality Used**

None.

**Special JS Features/Syntax**

The test case uses the spread syntax (`{ ... }`) and DJuka (destructure assignment) syntax (`var other = { ...params, a: 2 };`). These features are part of modern JavaScript syntax and are widely supported in most browsers.

**Alternatives**

If you wanted to create a similar benchmark, you could consider adding additional options, such as:

* Using `Object.create()` or `Object.prototype.hasOwnProperty.call()`
* Utilizing libraries like Lodash or Ramda for utility functions
* Comparing performance with different data structures (e.g., arrays vs. objects)

However, the provided benchmark already provides a good starting point to explore the differences between spread syntax and `Object.assign()`.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36

Browser/OS: Chrome 70 on Linux

View result in a separate tab

Test name	Executions per second
assign	6456472.0 Ops/sec
spread	55705300.0 Ops/sec

Related benchmarks:

assign vs spread vs djuka vs marac (version: 0)

Comparing performance of: assign vs spread

Created: 4 years ago by: Guest

Jump to the latest result

assign

spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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