Benchmark: lodash.each vs Object.forEachsss

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>

Script Preparation code:

var testmap = {};
var testarray = [];

for (i = 0; i < 1000; i++) {
    const content = "string" + i;
    
    testmap[i] = {
        content
    };
    
    testarray.push({
        id: i,
        content
    });
}

function getRandomInt(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min)) + min;
}

Tests:

lodash.findkey
const str = "string" + getRandomInt(0, 1000); _.findKey(testmap, ({content}) => content === str);
lodash.findindex
const str = "string" + getRandomInt(0, 1000); _.findIndex(testarray, ({content}) => content === str);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.findkey
lodash.findindex

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark test.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test on MeasureThat.net. The test compares two different approaches for finding an element in an object and an array, using Lodash's `findKey` and `findIndex` functions respectively.

**Options Compared**

Two options are compared:

1. **Lodash's `findKey` function**: This function searches the map for the first key that has a value equal to the given string.
2. **Plain `Object.forEach` loop with callback**: This approach iterates over each key-value pair in the object, checks if the value matches the given string, and returns the key of the first match.

**Pros and Cons**

**Lodash's `findKey` function:**

Pros:

* More concise and expressive code
* Reduces boilerplate and improves readability
* Optimized for performance by using a map-based search

Cons:

* May have performance overhead due to Lodash's additional functionality
* Not suitable for situations where the value is not present in the object, as it will return `undefined`

**Plain `Object.forEach` loop with callback:**

Pros:

* More flexible and customizable code
* Does not rely on external libraries (Lodash)
* Can handle cases where the value is not present in the object

Cons:

* More verbose and less expressive code
* Requires more manual iteration over key-value pairs, which can be error-prone

**Library: Lodash**

Lodash is a popular JavaScript library that provides a collection of helper functions for common tasks, such as array manipulation, object iteration, and more. In this case, `findKey` is used to search the map for the first key with a matching value.

**Special JS Feature/Syntax**

None mentioned in the provided code snippet.

**Other Alternatives**

For finding an element in an object or array without using Lodash's `findKey` function, other approaches could be:

* Using `Object.keys()` and `Array.prototype.find()` for arrays
* Implementing a custom loop with key-value pair iteration
* Utilizing libraries like underscore.js (the original author of Lodash) or other alternatives.

For situations where performance is critical, it's essential to consider the trade-offs between conciseness, readability, and customization versus raw speed. MeasureThat.net's benchmark results can help you understand which approach performs better in your specific use case.

Related benchmarks:

lodash.each vs Object.forEachsss (version: 0)

Comparing performance of: lodash.findkey vs lodash.findindex

Created: 7 years ago by: Guest

Jump to the latest result

lodash.findkey

lodash.findindex

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):