Benchmark: Compare string equals performance without case diffs

Script Preparation code:

var a = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
var b = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
var config = {
    sensitivity: 'base'
};

Tests:

===
a.toLowerCase() === b.toLowerCase()
locale compare
a.localeCompare(b, 'en', config);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
===
locale compare

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser/OS: Chrome 119 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
===	13731808.0 Ops/sec
locale compare	328925.6 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.

**Benchmark Overview**

The benchmark compares the performance of two approaches to check if two strings are equal without case differences: using the `===` operator (equality comparison) and using the `localeCompare()` method with a specific configuration.

**Options Compared**

Two options are compared:

1. **Equality Comparison (`===`)**: This approach uses the `===` operator, which checks for both value equality and type equality. In this case, it's used to check if two strings are equal without considering case differences.
2. **Locale-Independent String Comparison (`localeCompare()`)**: This approach uses the `localeCompare()` method, which compares two strings based on their locale settings. The method takes three arguments:
	* `a`: The first string to compare.
	* `b`: The second string to compare.
	* `config`: An object containing configuration options for the comparison.

**Pros and Cons of Each Approach**

1. **Equality Comparison (`===`)**:
	* Pros: Simple, widely supported, and fast.
	* Cons: Can be sensitive to type differences (e.g., comparing a string with an integer).
2. **Locale-Independent String Comparison (`localeCompare()`)**:
	* Pros: More robust against cultural and language differences, takes into account Unicode characters, and can handle non-ASCII strings.
	* Cons: Slower than equality comparison, may not be as widely supported, and requires a locale-aware implementation.

**Library Used**

In this benchmark, the `localeCompare()` method is used from the JavaScript standard library. The purpose of this method is to provide a way to compare strings in a culture-agnostic manner, taking into account the nuances of different languages and scripts.

**Special JS Features or Syntax**

There are no special features or syntax mentioned in this benchmark that would require specific knowledge of JavaScript. However, it's worth noting that the `localeCompare()` method is not supported in older browsers, so you may need to use a polyfill or fallback approach for compatibility.

**Other Alternatives**

If you want to compare strings without case differences but don't want to use the `localeCompare()` method, you can consider using:

1. **Regex-based comparison**: Use regular expressions to match the strings exactly, ignoring case and whitespace.
2. **Case-insensitive string comparison libraries**: There are libraries like Lodash or Underscore.js that provide a case-insensitive comparison function.

Keep in mind that these alternatives may have different performance characteristics and might not be as widely supported as the standard `localeCompare()` method.

In summary, this benchmark tests the performance of two approaches to compare strings without case differences: equality comparison using the `===` operator and locale-independent string comparison using the `localeCompare()` method. The latter approach is more robust but slower and may require a polyfill for older browsers.

Related benchmarks:

Compare string equals performance without case diffs (version: 0)

Comparing performance of: === vs locale compare

Created: 2 years ago by: Guest

Jump to the latest result

===

locale compare

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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