Benchmark: toUpperCase vs toLowerCase

Tests:

toUpperCase
const text = "Meu Nome É João Da Silva" text.toUpperCase()
toLowerCase
const text = "Meu Nome É João Da Silva" text.toLowerCase()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toUpperCase
toLowerCase

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark JSON and explain what's being tested.

**Benchmark Definition**

The benchmark is testing two JavaScript methods: `toUpperCase()` and `toLowerCase()`. The purpose of this benchmark is to compare the performance of these two methods on a specific string input.

**Script Preparation Code and Html Preparation Code**

Since both scripts and HTML preparation codes are set to null, it means that:

* No code-specific setup or configuration is required for the benchmark.
* No HTML-specific elements or attributes need to be parsed or processed before running the tests.
* The focus is solely on measuring the performance of the JavaScript methods being tested.

**Individual Test Cases**

There are two test cases:

1. `toUpperCase()`: This test case measures the performance of the `toUpperCase()` method on a given string input.
2. `toLowerCase()`: This test case measures the performance of the `toLowerCase()` method on the same string input as above.

**Library and Purpose**

Both tests use a built-in JavaScript library: the String prototype object, which provides methods for working with strings. The purpose of this library is to provide standardized and efficient ways to manipulate strings in JavaScript.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax used in these test cases. They only employ standard JavaScript methods (toUpperCase() and toLowerCase()) on a given string input.

**Other Alternatives**

If you were to write your own benchmarking framework, here are some alternative approaches:

1. **Manual Timing**: Measure the execution time of each method manually using the `Date.now()` function or similar.
2. **Benchmarking Libraries**: Utilize existing benchmarking libraries like Benchmark.js, Microbenchmark, or JSPerf to create and run benchmarks.
3. **Web Workers**: Run tests in separate web workers to avoid blocking the main thread and improve performance.

**Pros and Cons of Different Approaches**

Here's a brief summary:

* **Manual Timing**: Easy to implement, but may not provide accurate results due to system load or other external factors.
	+ Pros: Simple to set up, no dependencies required.
	+ Cons: May be inaccurate, requires manual intervention for test setup.
* **Benchmarking Libraries**: Robust and reliable, provides accurate results and handles various edge cases.
	+ Pros: Provides accurate results, handles edge cases, reduces developer overhead.
	+ Cons: Additional library dependency, may have learning curve.
* **Web Workers**: Ideal for large-scale or long-running benchmarks, reduces blocking issues.
	+ Pros: Improves performance by running tests in separate threads, ideal for large-scale benches.
	+ Cons: Requires more complex setup, additional resources required.

In conclusion, the MeasureThat.net benchmark provides a well-structured and efficient way to compare the performance of JavaScript methods. By understanding the underlying approach and alternatives, developers can create their own benchmarks or choose from existing frameworks to optimize their code's execution speed.

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/119.0.0.0 Safari/537.36 Edg/119.0.0.0

Browser/OS: Chrome 119 on Windows

View result in a separate tab

Test name	Executions per second
toUpperCase	2742323200.0 Ops/sec
toLowerCase	2737123840.0 Ops/sec

Related benchmarks:

toUpperCase vs toLowerCase (version: 0)

Comparing performance of: toUpperCase vs toLowerCase

Created: one year ago by: Guest

Jump to the latest result

toUpperCase

toLowerCase

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):