Benchmark: 366dde3c-df1b-4c33-8095-a83229ef9108

Script Preparation code:

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

Tests:

a.toLowerCase() === b.toLowerCase()
a.toLowerCase() === b.toLowerCase()
a.localeCompare(b,undefined,o)
a.localeCompare(b,undefined,o)
c.toLowerCase() === b.toLowerCase()
c.toLowerCase() === b.toLowerCase()
c.localeCompare(b,undefined,o)
c.localeCompare(b,undefined,o)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
a.toLowerCase() === b.toLowerCase()
a.localeCompare(b,undefined,o)
c.toLowerCase() === b.toLowerCase()
c.localeCompare(b,undefined,o)

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition is a set of test cases that compare different approaches to performing string case-insensitive comparison or sensitivity analysis. There are four individual test cases:

1. `a.toLowerCase() === b.toLowerCase()` - This test case compares two strings (`"John Doe"` and `"john doe"`) by converting both to lowercase using the `toLowerCase()` method.
2. `a.localeCompare(b, undefined, o)` - This test case uses the `localeCompare()` method with an options object (`o`) to compare the same two strings as above. The `localeCompare()` method returns a negative value if the first string is less than the second, a positive value if it's greater, and 0 if they are equal.
3. `c.toLowerCase() === b.toLowerCase()` - This test case repeats the first comparison but with a different string (`"john smith"`).
4. `c.localeCompare(b, undefined, o)` - This test case repeats the second comparison but with the same different string (`"john smith"`).

**Library/Feature**

There is no external library used in these benchmark tests. However, two JavaScript methods are being compared:

* `toLowerCase()`: a standard method that converts a string to lowercase.
* `localeCompare()`: a standard method that compares strings based on their Unicode code points, considering locale-specific rules.

**Options Object (`o`)**

In the test cases using `localeCompare()` (2 and 4), an options object (`o`) is passed as the third argument. This object has a single property: `sensitivity: 'accent'`. The purpose of this option is to control how the comparison should handle accented characters. In this case, it's set to `'accent'`, which means that strings with accent marks will be considered equal if they are otherwise identical.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

* `toLowerCase() === toLowerCase()`:
	+ Pros: simple and efficient.
	+ Cons: ignores case differences, may not work correctly for accented characters.
* `localeCompare()` with options object (`sensitivity: 'accent'`):
	+ Pros: considers case, space, and accent marks when comparing strings.
	+ Cons: more complex and potentially slower due to the Unicode-based comparison.

**Alternatives**

If you need a different approach or want to compare other methods, here are some alternatives:

* Using `normalize()` method before `localeCompare()`: This can help with accented character handling by normalizing the input strings.
* Using `String.prototype.at()` (ECMAScript 2022+): A new string indexing method that returns the first character of a string, which could be used in combination with other methods for case-insensitive comparison.

Keep in mind that these alternatives may have their own pros and cons, and the best approach will depend on your specific use case.

Related benchmarks:

366dde3c-df1b-4c33-8095-a83229ef9108 (version: 0)

Comparing performance of: a.toLowerCase() === b.toLowerCase() vs a.localeCompare(b,undefined,o) vs c.toLowerCase() === b.toLowerCase() vs c.localeCompare(b,undefined,o)

Created: 3 years ago by: Guest

Jump to the latest result

a.toLowerCase() === b.toLowerCase()

a.localeCompare(b,undefined,o)

c.toLowerCase() === b.toLowerCase()

c.localeCompare(b,undefined,o)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):