Benchmark: localeLowerCase vs LowerCase

Script Preparation code:

var a = "John Doe"

Tests:

lowerCase
a.toLowerCase()
localeLowerCase
a.toLocaleLowerCase()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lowerCase
localeLowerCase

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Windows

View result in a separate tab

Test name	Executions per second
lowerCase	98260144.0 Ops/sec
localeLowerCase	41319868.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**What is being tested?**

The benchmark compares the performance of two approaches:

1. `toLowerCase()`: a standard JavaScript method to convert a string to lowercase.
2. `toLocaleLowerCase()`: an internationalization-specific method to convert a string to lowercase, taking into account locale settings.

**Options compared:**

* The two methods are being tested for their execution speed.
* The results will show which method is faster and more efficient on the provided hardware (Chrome 116 on Linux Desktop).

**Pros and Cons of each approach:**

1. `toLowerCase()`:
	* Pros:
		+ Widely supported by most browsers and environments.
		+ Simple to implement and understand.
	* Cons:
		+ May not handle locale-specific conversions correctly, potentially leading to unexpected results.
2. `toLocaleLowerCase()`: (introduced in ECMAScript 2017)
	* Pros:
		+ Takes into account locale settings, ensuring consistent behavior across different regions.
		+ Designed for internationalization purposes.
	* Cons:
		+ May have a slight performance overhead due to the additional processing required.

**Other considerations:**

* The benchmark only tests these two methods and does not consider other factors like memory usage or thread safety.
* The results may vary depending on the specific use case, input data, or system configuration.

**Library:**

In this benchmark, there is no explicitly mentioned library. However, `toLocaleLowerCase()` is a built-in method of JavaScript's String prototype, which means it's part of the standard language and doesn't require any external libraries to be available.

**Special JS feature or syntax:**

The use of `toLocaleLowerCase()` requires knowledge of ECMAScript 2017 features and internationalization concepts. It's not essential for understanding the basic concept of benchmarking JavaScript performance, but it's a notable aspect of this specific benchmark.

**Alternatives:**

Other alternatives for measuring JavaScript performance include:

1. Benchmarking frameworks like Benchmark.js or JSPerf.
2. Web Performance APIs (e.g., `performance.now()` or `requestAnimationFrame()`) to measure execution time and other metrics.
3. Testing libraries like Jest or Mocha, which provide built-in support for benchmarking and testing.

These alternatives can be used in various scenarios to measure performance, but MeasureThat.net provides a simple and accessible way to compare specific JavaScript methods and features.

Related benchmarks:

localeLowerCase vs LowerCase (version: 0)

Comparing performance of: lowerCase vs localeLowerCase

Created: 2 years ago by: Guest

Jump to the latest result

lowerCase

localeLowerCase

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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