Benchmark: String compares (sensitive & insensitive & undefined)

Script Preparation code:

var a = 'aBcD eFgH iJkLmN'
var b = 'AbCd eFgH iJkLmN'
var c = 'aBcD eFgH iJkLmNx'
var d = 'aBcD eFgH iJkLmn'

var enCollator = new Intl.Collator('en', { sensitivity: 'accent' });

Tests:

LowerCase compare a&b
a.toLowerCase() === b.toLowerCase()
Collator compare
enCollator.compare(a, b) === 0
UpperCase compare
a.toUpperCase() === b.toUpperCase()
Sensitive compare
a === b
Lower a & c
a.toLowerCase() === c.toLowerCase()
Lower a & d
a.toLowerCase() === d.toLowerCase()
Undefined test & lower a&b
!!(a && b && a.toLowerCase() === b.toLowerCase())

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
LowerCase compare a&b
Collator compare
UpperCase compare
Sensitive compare
Lower a & c
Lower a & d
Undefined test & lower a&b

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser/OS: Chrome 105 on Windows

View result in a separate tab

Test name	Executions per second
LowerCase compare a&b	8036329.5 Ops/sec
Collator compare	3277209.8 Ops/sec
UpperCase compare	7423636.0 Ops/sec
Sensitive compare	9373343.0 Ops/sec
Lower a & c	8028903.0 Ops/sec
Lower a & d	8074987.0 Ops/sec
Undefined test & lower a&b	4329966.5 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents a benchmarking test for comparing strings in JavaScript, with various sensitivity levels and Unicode character cases. The test uses a set of predefined strings (`a`, `b`, `c`, and `d`) to measure the performance of different string comparison approaches.

**Comparison Options**

There are four main comparison options:

1. **Sensitive Compare**: This option compares two strings using their exact case and punctuation, without any normalization or sensitivity adjustments.
2. **LowerCase Compare**: This option compares two strings after converting both to lowercase using the `toLowerCase()` method.
3. **UpperCase Compare**: This option compares two strings after converting both to uppercase using the `toUpperCase()` method.
4. **Collator Compare**: This option uses the ICU Collator library (`Intl.Collator`) to compare two strings based on their Unicode character case and sensitivity.

**Pros and Cons of Each Approach**

1. **Sensitive Compare**:
	* Pros: Provides the most accurate results, as it compares strings without any normalization or sensitivity adjustments.
	* Cons: Can be slower due to the more complex string comparison process.
2. **LowerCase Compare**:
	* Pros: Faster than sensitive compare, as it uses a simple conversion method.
	* Cons: May not produce accurate results if the input strings contain non-ASCII characters.
3. **UpperCase Compare**:
	* Pros: Similar to lower case compare, but with an opposite effect on the comparison result.
	* Cons: Also has limitations with non-ASCII characters.
4. **Collator Compare**:
	* Pros: Provides accurate results for Unicode character cases and sensitivity, while being relatively fast compared to sensitive compare.
	* Cons: May require additional setup and configuration (e.g., setting the locale and collation attributes).

**Library and Syntax**

The test uses the ICU Collator library (`Intl.Collator`) to perform the collator comparison. This library is part of the JavaScript standard library and provides a way to normalize and compare strings based on their Unicode character case and sensitivity.

No special JavaScript syntax or features are used in this benchmark, apart from using template literals for string concatenation.

**Other Alternatives**

For alternative approaches, consider:

* Using regular expressions (e.g., `^abc$` for exact matches)
* Implementing a custom string comparison algorithm
* Utilizing other libraries like `String.prototype.localeCompare()` or `punycode`
* Experimenting with different JavaScript engines or interpreters to compare performance differences

Related benchmarks:

String compares (sensitive & insensitive & undefined) (version: 0)

Comparing performance of: LowerCase compare a&b vs Collator compare vs UpperCase compare vs Sensitive compare vs Lower a & c vs Lower a & d vs Undefined test & lower a&b

Created: 2 years ago by: Guest

Jump to the latest result

LowerCase compare a&b

Collator compare

UpperCase compare

Sensitive compare

Lower a & c

Lower a & d

Undefined test & lower a&b

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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