Benchmark: string comparison bnchmk 1

Script Preparation code:

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

Tests:

toLowerCase()
a.toLowerCase() === b.toLowerCase()
toLowerCase() FAIL
c.toLowerCase() === b.toLowerCase()
toLocaleLowerCase()
a.toLocaleLowerCase() === b.toLocaleLowerCase()
toLocaleLowerCase() FAIL
c.toLocaleLowerCase() === b.toLocaleLowerCase()
mapped
d[a] === b
mapped FAIL
d[a] === c

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toLowerCase()
toLowerCase() FAIL
toLocaleLowerCase()
toLocaleLowerCase() FAIL
mapped
mapped FAIL

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

**What is being tested:**

The provided benchmark tests the performance of three different string comparison methods in JavaScript:

1. `toLowerCase()`: This method converts a string to lowercase and returns the result.
2. `toLocaleLowerCase()`: This method converts a string to lowercase, taking into account the locale and cultural settings of the user's device.
3. Mapped lookup using object keys (`d[a] === b`): This test checks if the browser can efficiently access and compare values in an object using its keys.

**Options compared:**

The benchmark compares the performance of these three methods in different scenarios:

* `toLowerCase()`: The base case, which is expected to be the slowest.
* `toLocaleLowerCase()`: A variant that takes into account cultural settings, potentially affecting performance.
* Mapped lookup (`d[a] === b`): A more complex operation that tests the browser's ability to handle object key lookups efficiently.

**Pros and Cons of each approach:**

1. `toLowerCase()`:
	* Pros: Simple, widely supported, and easy to implement.
	* Cons: May be slower due to locale considerations, potential performance issues on certain devices or browsers.
2. `toLocaleLowerCase()`:
	* Pros: Takes into account cultural settings, providing more accurate results in some cases.
	* Cons: May introduce additional overhead, affecting performance, especially if the browser doesn't support this method or handles it poorly.
3. Mapped lookup (`d[a] === b`):
	* Pros: Can be faster than `toLowerCase()` and `toLocaleLowerCase()` for certain use cases, as it only accesses object keys once.
	* Cons: Requires accessing an object's keys, which may introduce additional overhead depending on the size of the object or the browser's implementation.

**Library usage:**

None of the test cases explicitly uses a library. However, the `toLocaleLowerCase()` method relies on the JavaScript language standard's support for locale-aware string manipulation, which is implemented by most modern browsers.

**Special JS feature or syntax:**

The benchmark tests the performance of the following special features:

1. Object property access using square brackets (`d[a] === b`).
2. Locale-aware string manipulation (`toLocaleLowerCase()`).

These features are well-supported in modern JavaScript and are part of the language standard, but their performance may vary depending on the browser and device used.

**Other alternatives:**

If you wanted to add more test cases or variations, some alternative approaches could be:

* Testing `toUpperCase()`, `trim()`, or other string manipulation methods.
* Investigating the performance of different data structures (e.g., arrays, objects) for lookup operations.
* Examining the impact of caching or memoization on string comparison performance.

Keep in mind that adding new test cases should carefully consider the relevance and value to the broader JavaScript ecosystem.

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/102.0.0.0 Safari/537.36

Browser/OS: Chrome 102 on Windows

View result in a separate tab

Test name	Executions per second
toLowerCase()	3705556.5 Ops/sec
toLowerCase() FAIL	3498360.5 Ops/sec
toLocaleLowerCase()	1405782.6 Ops/sec
toLocaleLowerCase() FAIL	1535609.8 Ops/sec
mapped	2964329.0 Ops/sec
mapped FAIL	2701650.5 Ops/sec

Related benchmarks:

string comparison bnchmk 1 (version: 0)

Comparing performance of: toLowerCase() vs toLowerCase() FAIL vs toLocaleLowerCase() vs toLocaleLowerCase() FAIL vs mapped vs mapped FAIL

Created: 2 years ago by: Guest

Jump to the latest result

toLowerCase()

toLowerCase() FAIL

toLocaleLowerCase()

toLocaleLowerCase() FAIL

mapped

mapped FAIL

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):