Benchmark: case insensitive comparison

Script Preparation code:

var a = "John Doe"
var b = "john doe"
var c = "john smith"
var d = "joHn Smith"
var e = "JoHn SmiTh"

Tests:

TLC fail 1
a.toLowerCase() == b.toLowerCase()
TLC pass 1
d.toLowerCase() == b.toLowerCase()
TLC pass 2
e.toLowerCase() == d.toLowerCase()
TLC fail 2
a.toLowerCase() == e.toLowerCase()
LC fail 1
a.localeCompare(b, 'en', {'sensitivity': 'base'});
LC pass 1
d.localeCompare(b, 'en', {'sensitivity': 'base'});
LC pass 2
e.localeCompare(d, 'en', {'sensitivity': 'base'});
LC fail 2
a.localeCompare(e, 'en', {'sensitivity': 'base'});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
TLC fail 1
TLC pass 1
TLC pass 2
TLC fail 2
LC fail 1
LC pass 1
LC pass 2
LC fail 2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (iPad; CPU OS 14_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/96.0.4664.53 Mobile/15E148 Safari/604.1

Browser/OS: Chrome Mobile iOS 96 on iOS 14.8

View result in a separate tab

Test name	Executions per second
TLC fail 1	4713558.0 Ops/sec
TLC pass 1	5397815.0 Ops/sec
TLC pass 2	4529903.0 Ops/sec
TLC fail 2	4506215.5 Ops/sec
LC fail 1	192890.5 Ops/sec
LC pass 1	192248.6 Ops/sec
LC pass 2	192690.7 Ops/sec
LC fail 2	189233.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview**

The provided JSON represents a benchmark test case for comparing case insensitivity in JavaScript string comparisons. The benchmark tests the performance of two approaches: using the `toLowerCase()` method and using the `localeCompare()` function with the `sensitivity` option set to `'base'`.

**Benchmark Definition**

The benchmark definition is the script preparation code, which defines five strings:

* `a = "John Doe"`
* `b = "john doe"` (case-insensitive comparison)
* `c = "john smith"` (not used in this benchmark)
* `d = "joHn Smith"` (case-insensitive comparison with extra 'H')
* `e = "JoHn SmiTh"` (case-insensitive comparison)

**Test Cases**

There are eight test cases, each defining a specific string comparison scenario:

1. `a.toLowerCase() == b.toLowerCase()` - tests case insensitivity using the `toLowerCase()` method
2. `d.toLowerCase() == b.toLowerCase()` - tests case insensitivity using the `toLowerCase()` method on a different string
3. `e.toLowerCase() == d.toLowerCase()` - tests case insensitivity using the `toLowerCase()` method on another string
4. `a.localeCompare(b, 'en', {'sensitivity': 'base'})` - tests case insensitivity using the `localeCompare()` function with sensitivity set to `'base'`
5-8 are similar variations of test cases 1-3, but using different strings and locale settings.

**Options Compared**

The two options being compared in this benchmark are:

* Using the `toLowerCase()` method for case-insensitive comparisons
* Using the `localeCompare()` function with the `sensitivity` option set to `'base'`

**Pros and Cons of Each Approach**

**`toLowerCase()` Method:**

Pros:

* Widely supported and implemented across browsers
* Easy to use and understand

Cons:

* Can be slow for large strings or complex comparisons
* May not preserve Unicode properties or character normalization

**LocaleCompare() Function with sensitivity set to `'base'`:**

Pros:

* Preserves Unicode properties and character normalization
* Supports more sophisticated comparison logic (e.g., comparing strings in different locales)

Cons:

* Less widely supported than `toLowerCase()` across older browsers
* More complex usage and potentially slower performance for simple comparisons

**Other Considerations**

The benchmark also uses the `sensitivity` option set to `'base'`, which affects how the localeCompare() function handles case-insensitive comparisons. This can have implications for how different locales handle character normalization and Unicode properties.

**Library Used**

None, as both `toLowerCase()` and `localeCompare()` are built-in JavaScript methods.

Overall, this benchmark aims to compare the performance of two approaches for case-insensitive string comparisons in JavaScript, highlighting the trade-offs between simplicity and precision in string comparison logic.

Related benchmarks:

case insensitive comparison (version: 0)

Comparing performance of: TLC fail 1 vs TLC pass 1 vs TLC pass 2 vs TLC fail 2 vs LC fail 1 vs LC pass 1 vs LC pass 2 vs LC fail 2

Created: 3 years ago by: Guest

Jump to the latest result

TLC fail 1

TLC pass 1

TLC pass 2

TLC fail 2

LC fail 1

LC pass 1

LC pass 2

LC fail 2

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):