Benchmark: Js deep object merge

HTML Preparation code:

<script src="https://unpkg.com/deepmerge@4.2.2/dist/cjs.js"></script>
<script src="https://unpkg.com/deep-merge@1.0.0/index.js"></script>

Script Preparation code:

var object1 = {
  'a': {
    'foo': 123123,
    'bar': 123,
    'fobar': 456,
    'test': {
      'foo1': 123123,
      'bar1': 123,
    }
  }
};

var object2 = {
  'a': {
    'foo': 345,
    'bar': 123,
    'fobar': 45,
    'test': {
      'bar1': 123,
      'new': true
    }
  }
};

Tests:

deepmerge
deepmerge = window.deepmerge; deepmerge(object1,object2)
deep-merge
DeepMerge = window.DeepMerge DeepMerge(object1,object2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
deepmerge
deep-merge

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 definition and test cases.

**Benchmark Definition JSON**

The benchmark defines two tests: `deep-merge` and `deepmerge`. The script preparation code includes two JavaScript objects, `object1` and `object2`, which represent nested object structures. The html preparation code includes links to external libraries: `deepmerge@4.2.2/dist/cjs.js` and `deep-merge@1.0.0/index.js`.

**Options Compared**

The benchmark compares the execution performance of two approaches:

1.  **deep-merge**: This approach uses a library called Deep Merge (also known as deepmerge) to merge the two objects. The library is included in the html preparation code.
2.  **deepmerge**: This approach uses a global variable `window.deepmerge` to access the same Deep Merge library, which is also included in the html preparation code.

**Pros and Cons of Different Approaches**

1.  **Using an external library (Deep Merge)**:
    *   Pros:
        *   Provides a standardized way of merging objects.
        *   Maintained by a community of developers.
    *   Cons:
        *   Requires additional download time for the library.
        *   May introduce some overhead due to the need to include the library's code in the html file.

2.  **Using a global variable (`window.deepmerge`)**:
    *   Pros:
        *   No additional download time required.
        *   The approach is already included in the benchmark, so no extra setup is needed for users running the test.
    *   Cons:
        *   May not be maintained or updated by the same community as the external library.
        *   Requires users to have the global variable set up on their browser.

**Library Description and Purpose**

Deep Merge (also known as deepmerge) is a JavaScript library that provides a simple way to merge two objects recursively. It can handle nested object structures, including arrays, booleans, numbers, strings, and other values.

The purpose of using Deep Merge in this benchmark is to test the performance of different approaches for merging two complex object structures. The benchmark allows users to compare the execution times of these approaches without having to write their own code for merging objects.

**Special JavaScript Feature/Syntax**

There are no special JavaScript features or syntax used in this benchmark that would require specific knowledge to understand. The focus is on comparing the performance of different methods for merging objects, which is a common task in many software applications.

**Alternatives**

If you're interested in testing other approaches for merging objects, here are some alternatives:

1.  **Lodash**: Lodash is a popular JavaScript utility library that provides a `merge` function for combining two objects. You can include Lodash's code in the html preparation code and use it instead of Deep Merge.

2.  **JSON Merge Patch (JMP)**: JMP is another approach to merging objects, which produces a patch object that describes the differences between the original and target objects. This approach can be useful for comparing changes across different versions or branches.

3.  **Manual Implementation**: You can also implement your own logic for merging objects without using any external libraries. This approach allows you to optimize performance based on specific requirements, such as ignoring certain properties or handling arrays differently.

Feel free to experiment with these alternatives and see how they perform compared to the Deep Merge library used in this benchmark!

Latest run results:

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

User agent: Mozilla/5.0 (Android 14; Mobile; rv:132.0) Gecko/132.0 Firefox/132.0

Browser/OS: Firefox Mobile 132 on Android

View result in a separate tab

Test name	Executions per second
deepmerge	204050.4 Ops/sec
deep-merge	10623004.0 Ops/sec

Related benchmarks:

Js deep object merge (version: 0)

Comparing performance of: deepmerge vs deep-merge

Created: 4 years ago by: Guest

Jump to the latest result

deepmerge

deep-merge

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):