Benchmark: Compare string equals performance

Script Preparation code:

var a = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';
var b = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
var config = {
    sensitivity: 'accent'
};

Tests:

To lower()
a.toLowerCase() === b.toLowerCase()
To upper()
a.toUpperCase() === b.toUpperCase()
locale compare
a.localeCompare(b, 'en', config);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
To lower()
To upper()
locale compare

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/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
To lower()	9421856.0 Ops/sec
To upper()	8598357.0 Ops/sec
locale compare	190822.3 Ops/sec

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is crucial for optimizing and improving the efficiency of web applications.

The provided JSON represents a benchmark test created on MeasuringThat.net, which allows users to create and run JavaScript microbenchmarks. The test compares the performance of different approaches when comparing strings.

**Options Compared:**

1. `toLowerCase()` vs. `toUpperCase()`: This option tests the performance of converting a string to lowercase and uppercase using two different methods.
2. `localeCompare(b, 'en', config)`: This option tests the performance of using the `localeCompare` method with a locale set to English (`'en'`) and a specific configuration (`config`).

**Pros and Cons:**

1. **toLowerCase() vs. toUpperCase():**
	* Pros:
		+ Both methods are widely supported by most browsers.
		+ They provide consistent results, as the conversion is case-insensitive.
	* Cons:
		+ Converting a string to lowercase or uppercase can be expensive in terms of CPU cycles and memory usage, especially for large strings.
2. **localeCompare(b, 'en', config):**
	* Pros:
		+ This method takes into account the locale and cultural differences when comparing strings.
		+ It can provide more accurate results than `toLowerCase()` or `toUpperCase()`, as it considers the context in which the string is used (e.g., date and time formats).
	* Cons:
		+ The performance of `localeCompare` can vary depending on the locale and configuration used.
		+ Not all browsers support this method, so results may not be consistent across different browsers.

**Library:**

None are explicitly mentioned in the provided JSON. However, it's worth noting that some benchmarking libraries like BenchmarkJS or PerfTest might be used to run these tests, but they are not integrated into MeasuringThat.net itself.

**Special JS Feature/Syntax:**

The test uses special JavaScript features:

1. `toLowerCase()` and `toUpperCase()`: These methods are part of the ECMAScript standard and provide case-insensitive string comparison.
2. `localeCompare(b, 'en', config)`: This method is part of the Intl API (Internationalization API), which provides support for Unicode and cultural differences.

**Other Considerations:**

When running this benchmark test, consider the following:

1. **Browser Support:** Ensure that the target browsers support all methods being compared.
2. **Locale Settings:** Be aware of the locale settings used in the `localeCompare` method, as they can affect performance.
3. **String Size:** The size of the strings being compared can impact performance. Larger strings may require more CPU cycles and memory usage.

**Alternatives:**

If you need to benchmark other string comparison methods or want to explore alternative approaches, consider the following options:

1. `normalize()` vs. `toLowerCase()` vs. `toUpperCase()`
2. Using regular expressions for case-insensitive matching
3. Implementing a custom string comparison algorithm

Keep in mind that each approach has its own trade-offs and may not provide consistent results across different browsers or use cases.

Related benchmarks:

Compare string equals performance (version: 0)

Comparing performance of: To lower() vs To upper() vs locale compare

Created: 3 years ago by: Registered User

Jump to the latest result

To lower()

To upper()

locale compare

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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