Benchmark: lodash vs native group by test 1337

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var fieldMappings = {
   first_name: {formFieldName:'fieldname1', DNBMap:'dnbmap1'},
   last_name: {formFieldName:'fieldname1', DNBMap:'dnbmap2'},
   alias3: {formFieldName:'fieldname2', DNBMap:'dnbmap3'}
}



var response = {
    first_name: 'field1Valuefst',
    last_name: 'field1Valuelst',
    alias3: 'field2Value'
}

  function nameFromResponse(response) {
    return Object
      .keys(response)
      .filter(key => key === 'first_name' || key === 'last_name')
      .map(key => response[key]).join(' ');
  }

Tests:

native
let massagedResponse = {}; let nameFieldName = fieldMappings.first_name.formFieldName; massagedResponse[nameFieldName] = nameFromResponse(response); Object.keys(response).filter(value => value !== 'first_name' && value !== 'last_name').forEach(key => { massagedResponse[fieldMappings[key].formFieldName] = response[key]; });
lodash
_(response) .mapValues(i=>{return{value: i}}) .merge(fieldMappings) .groupBy('formFieldName') .mapValues(j=>_.map(j, 'value').join(' ')) .value()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
native
lodash

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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Let's break down the provided JSON data to explain what's being tested and the different approaches used.

**Benchmark Definition**

The benchmark is comparing two approaches: native JavaScript (using vanilla functions) and Lodash (a popular JavaScript utility library). The benchmark is testing the performance of these two approaches for grouping by a specific field in an object.

**Script Preparation Code**

This code defines a `fieldMappings` object, which maps form field names to DNBMap values. It also defines a `response` object with three fields: `first_name`, `last_name`, and `alias3`. The `nameFromResponse` function takes the response object as input and returns a string by concatenating the values of the `first_name` and `last_name` fields.

**Html Preparation Code**

This line includes the Lodash library from a CDN, which is used in one of the benchmark definitions.

**Individual Test Cases**

There are two test cases:

1. **Native**: This test case uses native JavaScript functions to group the response object by field mappings. It first extracts the values for `first_name` and `last_name`, then iterates over the remaining keys, mapping each key to its corresponding form field name and value.
2. **Lodash**: This test case uses Lodash's `groupBy` function to group the response object by field mappings. The `mapValues` function is used to create an object with mapped values, and then the `merge` function is used to combine this object with the original field mappings.

**Pros and Cons**

* **Native JavaScript**:
	+ Pros: No external dependency on Lodash, potentially more familiar code for developers.
	+ Cons: May be slower due to the overhead of explicit looping and mapping.
* **Lodash**:
	+ Pros: Often faster than native JavaScript due to optimized functions and caching.
	+ Cons: Requires an additional external dependency (Lodash) and may have a steeper learning curve.

**Library and Purpose**

The `lodash` library is used for its `groupBy`, `mapValues`, `merge`, and other utility functions. The purpose of using Lodash in this benchmark is to provide a faster alternative to native JavaScript, while still maintaining compatibility with older browsers that may not support modern JavaScript features.

**Special JS Features or Syntax**

None are explicitly mentioned in the provided code.

**Other Alternatives**

If you're interested in exploring other alternatives for grouping objects by field mappings, here are some options:

* **Moment.js**: A popular date and time library that also provides grouping functionality.
* **Array.prototype.reduce()**: A built-in JavaScript function that can be used to group arrays by a specific property.
* **Underscore.js**: Another popular utility library that provides similar functionality to Lodash.

Note that the performance of these alternatives may vary depending on the specific use case and browser support.

Related benchmarks:

lodash vs native group by test 1337 (version: 0)

lodash vs native group by

Comparing performance of: native vs lodash

Created: 3 years ago by: Guest

Jump to the latest result

native

lodash

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):