Benchmark: Javascript: Case insensitive exact string comparison

Script Preparation code:

var a = "True"
var b = "true"
var c = "Foo"

Tests:

toLowerCase()
a.toLocaleLowerCase() === b
Regex
const re = /^true$/i re.test(a)
toLowerCase() FAIL
c.toLocaleLowerCase() === b
Regex FAIL
const re = /^true$/i re.test(c)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toLowerCase()
Regex
toLowerCase() FAIL
Regex 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/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
toLowerCase()	4399134.0 Ops/sec
Regex	6742181.5 Ops/sec
toLowerCase() FAIL	4506075.0 Ops/sec
Regex FAIL	6892631.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**Benchmark Definition**

The provided JSON represents a benchmark for case-insensitive exact string comparison in JavaScript. The test measures the performance of different approaches to compare strings without considering case differences.

**Script Preparation Code**

The script preparation code consists of three variables:
```javascript
var a = "True"
var b = "true"
var c = "Foo"
```
These variables are used as input values for the benchmark tests.

**Html Preparation Code**

There is no HTML preparation code provided, which means that the test is run in a headless browser environment.

**Individual Test Cases**

The benchmark consists of four individual test cases:

1. `toLowerCase()`: Tests if the `toLowerCase()` method can accurately compare strings without considering case differences.
2. `Regex`: Tests if regular expressions (regex) can be used to perform case-insensitive string comparisons.
3. `toLowerCase() FAIL`: Tests if the `toLowerCase()` method fails to accurately compare strings when used with different input values.
4. `Regex FAIL`: Tests if regular expressions fail to accurately compare strings when used with different input values.

**Options Compared**

The benchmark compares two approaches:

1. **`toLowerCase()`**: Uses the built-in `toLowerCase()` method to convert string inputs to lowercase before comparison.
2. **Regular Expressions (regex)**: Uses regex patterns to perform case-insensitive string comparisons.

**Pros and Cons of Each Approach**

1. **`toLowerCase()`**:
	* Pros: Simple, widely supported, and efficient for most use cases.
	* Cons: May not work as expected with non-ASCII characters or specific cultural requirements.
2. **Regular Expressions (regex)**:
	* Pros: Can handle complex patterns, case-insensitive matching, and is suitable for many edge cases.
	* Cons: Can be slower than `toLowerCase()` for simple string comparisons, may introduce additional overhead.

**Library Used**

There is no explicit library mentioned in the benchmark definition. However, it's likely that a built-in JavaScript method or function is used to implement the regex pattern.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax mentioned in this benchmark. The focus is on comparing different string comparison approaches.

**Other Alternatives**

If you're interested in exploring alternative approaches for case-insensitive string comparisons, some options include:

1. **Using Unicode normalization**: This method converts strings to a standard form, allowing for more accurate comparisons.
2. **Implementing a custom case-insensitive comparison function**: You can create a custom function using JavaScript's built-in functions or regex patterns to achieve the desired behavior.

Keep in mind that each alternative has its own trade-offs and may not be suitable for all use cases.

Related benchmarks:

Javascript: Case insensitive exact string comparison (version: 0)

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

Created: one year ago by: Guest

Jump to the latest result

toLowerCase()

Regex

toLowerCase() FAIL

Regex FAIL

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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