Benchmark: Javascript: Case insensitive string comparison performance with localeCompare call updated to specify locale.

Script Preparation code:

var a = "John Doe"
var b = "john doe"
var c = "john smith"
var o = {
    sensitivity: 'base'
}

Tests:

toLowerCase()
a.toLowerCase() === b.toLowerCase()
localeCompare()
a.localeCompare(b,'en',o)
toLowerCase() FAIL
c.toLowerCase() === b.toLowerCase()
localeCompare() FAIL
c.localeCompare(b,'en',o)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toLowerCase()
localeCompare()
toLowerCase() FAIL
localeCompare() FAIL

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

toLowerCase()

24.4M/s

toLowerCase() FAIL

10.8M/s

localeCompare() FAIL

73K/s

localeCompare()

70K/s

View exact numbers

Test name	Executions per second
✓ toLowerCase()	24,377,662 Ops/sec
toLowerCase() FAIL	10,764,888 Ops/sec
localeCompare() FAIL	73,317 Ops/sec
localeCompare()	69,611 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the JavaScript microbenchmark on MeasureThat.net.

**Benchmark Description:**

The benchmark tests the performance of two string comparison methods in JavaScript:

1. `toLowerCase()` (case-insensitive comparison)
2. `localeCompare()` with locale and sensitivity settings (base sensitivity)

The benchmark defines three test cases:

* `toLowerCase()`: comparing two strings using `toLowerCase()` method
* `localeCompare()`: comparing two strings using `localeCompare()` method with locale set to English (`'en'`) and base sensitivity

**Options Compared:**

The benchmark compares the performance of `toLowerCase()` vs. `localeCompare()` with different settings.

Pros and Cons:

* **`toLowerCase()`:**
	+ Pros:
		- Simple, widely supported method
		- Fast execution time
	+ Cons:
		- Case-sensitive comparison (may not work as expected for international strings)
		- May be less accurate than `localeCompare()` for comparing strings with different locales
* **`localeCompare()`:**
	+ Pros:
		- Provides a more accurate and case-insensitive comparison, especially for international strings
		- Allows for customization of locale and sensitivity settings
	+ Cons:
		- Requires support for the `Intl.Locale` API, which may not be available in all browsers or environments
		- May have higher execution time compared to `toLowerCase()`

**Library:**

The benchmark uses no external libraries.

**Special JS Features/Syntax:**

No special JavaScript features or syntax are used in this benchmark. However, it does use the `Intl.Locale` API for the `localeCompare()` method, which is a modern feature introduced in ECMAScript 2015 (ES6).

**Other Alternatives:**

If you need to compare strings using a different approach, you may consider:

* Using a regular expression with a case-insensitive flag (`i`) or using the `String.prototype.localeCompare()` method (not available in older browsers)
* Implementing your own custom comparison function using string manipulation and case folding techniques
* Using a third-party library that provides a more robust string comparison API, such as ICU (International Components for Unicode)

Keep in mind that these alternatives may have varying degrees of compatibility with different browsers and environments.

Javascript: Case insensitive string comparison performance with localeCompare call updated to specify locale. (version: 0)

Comparing performance of: `toLowerCase() vs localeCompare() vs toLowerCase() FAIL vs localeCompare() FAIL`

Created: 2 years ago by: Guest

Go to the latest result

toLowerCase()

localeCompare()

toLowerCase() FAIL

localeCompare() FAIL

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Javascript: Case insensitive string comparison performance with localeCompare call updated to specify locale. (version: 0)

Comparing performance of: toLowerCase() vs localeCompare() vs toLowerCase() FAIL vs localeCompare() FAIL

Created: 2 years ago by: Guest

Go to the latest result

toLowerCase()

localeCompare()

toLowerCase() FAIL

localeCompare() FAIL

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: `toLowerCase() vs localeCompare() vs toLowerCase() FAIL vs localeCompare() FAIL`