Benchmark: Object.assign - MeasureThat.net

Script Preparation code:

var test = { 'a':1, 'b':2, 'c':3 };

Tests:

Regular assign
test['a'] = 4; test['d'] = 5; test['e'] = 6;
Object.assign
Object.assign(test, { 'a': 4 }); Object.assign(test, { 'd': 5 }); Object.assign(test, { 'e': 6 });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regular assign
Object.assign

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

I'll provide an explanation of the benchmark, its options, pros and cons, and other considerations.

**Benchmark Overview**

The benchmark is designed to test the performance of `Object.assign` in JavaScript. It has two individual test cases:

1. "Regular assign"
2. "Object.assign"

**Script Preparation Code**

The script preparation code defines a variable `test` with three properties: `'a'`, `'b'`, and `'c'`. This variable is used as the target object for assignment.

**Html Preparation Code**

The HTML preparation code is empty, indicating that no additional HTML elements are involved in this benchmark.

**Test Cases**

There are two test cases:

### Regular assign

This test case uses a simple assignment pattern to update properties of the `test` object: `test['a'] = 4;`, `test['d'] = 5;`, and `test['e'] = 6;`. This is a straightforward way to demonstrate object assignment performance.

### Object.assign

This test case uses the `Object.assign` method to update properties of the `test` object. The benchmark calls `Object.assign(test, { 'a': 4 });`, followed by two more calls to assign additional properties using `Object.assign`. This test case aims to evaluate the performance of `Object.assign` in a real-world scenario.

**Pros and Cons**

The choice between the "Regular assign" and "Object.assign" approaches depends on the specific use case:

* **Regular assign**: Simple, straightforward assignment. Pros: Easy to understand, minimal overhead. Cons: May not accurately reflect real-world usage patterns.
* **Object.assign**: More complex scenario that mirrors real-world usage. Pros: Better representation of actual performance, potential for more accurate results. Cons: May introduce additional overhead due to the method call.

**Library and Purpose**

In the benchmark, `Object.assign` is used as a method on the global object (in this case, `window`). The purpose of this method is to copy properties from one or more source objects to a target object. It's an essential part of JavaScript that allows for efficient data exchange between objects.

**Special JS Feature/Syntax**

There are no special features or syntax used in this benchmark. However, it's worth noting that `Object.assign` was introduced as a standardized method in ECMAScript 2015 (ES6). The test cases cover both modern and older JavaScript versions.

**Other Alternatives**

If you're looking for alternative benchmarks or approaches, consider:

* **ES6+ only**: If you want to focus on the performance of ES6+ features or newer browsers.
* **Multi-threading**: To evaluate the performance of concurrent execution using multiple threads.
* **Real-world scenarios**: Integrate the benchmark with other tests that simulate real-world usage patterns, such as DOM manipulation or event handling.
* **Comparison with other methods**: Test and compare `Object.assign` against other assignment methods, like `forEach` or a custom implementation.

By exploring these alternatives, you can create more comprehensive benchmarks that provide deeper insights into JavaScript performance.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Windows

View result in a separate tab

Test name	Executions per second
Regular assign	5566060.5 Ops/sec
Object.assign	1514201.2 Ops/sec

Related benchmarks:

Object.assign (version: 0)

Test Object assign performance

Comparing performance of: Regular assign vs Object.assign

Created: 6 years ago by: Guest

Jump to the latest result

Regular assign

Object.assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):