Benchmark: Lodash replace VS JS Replace

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Script Preparation code:

var testString = ` Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed bibendum libero eu risus vehicula rutrum vel vel nisl. Maecenas nisi arcu, iaculis et odio sed, ullamcorper semper nunc. Ut finibus urna erat, quis euismod risus lacinia id. Nunc massa mi, scelerisque at convallis ac, blandit at metus. Interdum et malesuada fames ac ante ipsum primis in faucibus. In at hendrerit nunc. Donec neque turpis, ullamcorper eget volutpat id, semper eu libero. Vivamus hendrerit ultricies nibh vitae ullamcorper. Suspendisse euismod leo et ex bibendum fringilla. Curabitur quis tellus a ipsum congue blandit.

Nulla vel lectus neque. Donec elit elit, luctus imperdiet nibh et, efficitur molestie tellus. Morbi volutpat, nisi in ullamcorper dictum, sapien ipsum aliquam erat, in aliquam arcu nulla sit amet felis. Fusce sed tellus consequat, pellentesque lorem nec, pulvinar ex. Suspendisse nec dapibus lectus. Morbi non tempor mauris. Vivamus nec pretium lectus, pretium laoreet quam. `

Tests:

Lodash replace
_.replace(testString, "i", "*");
JS Replace
testString.replace("i", "*");

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

JS Replace

15.7M/s

Lodash replace

8.1M/s

Fastest: JS Replace (2.0x faster)

View exact numbers

✓ JS Replace: 15,734,977 ops/sec
• Lodash replace: 8,062,953 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash replace
JS Replace

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser/OS: Firefox 139 on Linux

View result in a separate tab

JS Replace

10.2M/s

Lodash replace

8.8M/s

View exact numbers

Test name	Executions per second
✓ JS Replace	10,188,478 Ops/sec
Lodash replace	8,814,064 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents two JavaScript microbenchmarks: `_.replace(testString, "i", "*");` using Lodash and `testString.replace("i", "*");` without any libraries.

**Lodash Replace Microbenchmark**

This benchmark tests the performance of Lodash's `_replace()` function against the built-in `replace()` method in JavaScript. The test string is a long, lorem ipsum-filled string, and the replace characters are "i" with "*".

*   **Library:** Lodash
*   **Purpose:** A utility library that provides various functions for working with arrays, objects, numbers, etc.
*   **Pros:**
    *   Well-tested and widely used library with a large community of developers contributing to it.
    *   Provides an efficient implementation for many common string operations.
*   **Cons:**
    *   Adds unnecessary overhead due to the inclusion of the entire Lodash library in the benchmark.
    *   May not be suitable for smaller projects where size matters.

**JS Replace Microbenchmark**

This benchmark tests the performance of the built-in `replace()` method in JavaScript against the Lodash `_replace()` function. The test string is a long, lorem ipsum-filled string, and the replace characters are "i" with "*".

*   **Pros:**
    *   Built-in functions are always available and don't add any additional overhead.
    *   May be more suitable for smaller projects or situations where size matters.
*   **Cons:**
    *   May not be as efficient as Lodash's implementation, depending on the specific use case.

**Other Considerations**

*   Both microbenchmarks measure the time taken to replace a single character in the test string with "*". This is likely an oversimplification of real-world usage, which may involve more complex operations or handling errors.
*   The benchmarks do not account for potential differences in JavaScript engine optimizations or caching between different browsers.

**Alternatives**

If you wanted to create alternative microbenchmarks, you could consider the following:

*   **Benchmarking String Replacing with a Custom Implementation:** Create a custom function that replaces characters in a string and measure its performance. This would allow you to explore different optimization techniques.
*   **Benchmarking Different String Replacement Methods:** In addition to `_.replace()` and `replace()`, you could also benchmark other methods, such as using `String.prototype.replace()` or creating a custom implementation with regular expressions.

These alternative benchmarks could provide more insight into the performance characteristics of different JavaScript strings replacement methods.

Lodash replace VS JS Replace (version: 0) Benchmark.js

Comparing performance of: `Lodash replace vs JS Replace`

Created: 5 years ago by: Guest

Go to the latest result

Lodash replace

JS Replace

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Lodash replace VS JS Replace (version: 0) Benchmark.js

Comparing performance of: Lodash replace vs JS Replace

Created: 5 years ago by: Guest

Go to the latest result

Lodash replace

JS Replace

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Lodash replace vs JS Replace`