Benchmark: lowerCase() vs upperCase()

Script Preparation code:

var items = [
    { name: 'Edward', value: 21 },
    { name: 'Sharpe', value: 37 },
    { name: 'And', value: 45 },
    { name: 'The', value: -12 },
    { name: 'Magnetic', value: 13 },
    { name: 'Zeros', value: 37 }
];

Tests:

lowerCase
items.sort((a, b) => { a = a.name.toLowerCase(); b = b.name.toLowerCase(); return a < b ? -1 : a > b ? 1 : 0; });
upperCase
items.sort((a, b) => { a = a.name.toUpperCase(); b = b.name.toUpperCase(); return a < b ? -1 : a > b ? 1 : 0; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lowerCase
upperCase

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser/OS: Chrome 143 on Windows

View result in a separate tab

Test name	Executions per second
lowerCase	5707745.5 Ops/sec
upperCase	3341530.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance of two approaches to sorting an array of objects: using `toLowerCase()` to convert names to lowercase, and using `toUpperCase()` to convert names to uppercase.

**Options Compared**

Two options are compared:

1. **lowerCase**: This option uses the `toLowerCase()` method to convert the `name` property of each object in the `items` array to lowercase before sorting.
2. **upperCase**: This option uses the `toUpperCase()` method to convert the `name` property of each object in the `items` array to uppercase before sorting.

**Pros and Cons**

*   **lowerCase**:
    *   Pros:
        *   Can be faster for sorting names that contain only lowercase characters.
        *   May be more efficient if you need to perform case-insensitive searches on the sorted data.
    *   Cons:
        *   May not be suitable for sorting names that contain uppercase characters, as it will convert them to lowercase, potentially altering their relative order.
*   **upperCase**:
    *   Pros:
        *   Will preserve the original case of the names in the sorted data.
        *   Can be more predictable and consistent when working with names that have mixed cases.
    *   Cons:
        *   May be slower for sorting names that contain only lowercase characters.

**Library Usage**

Neither of these benchmarks uses any external libraries. However, they do rely on built-in JavaScript methods like `toLowerCase()` and `toUpperCase()` to perform the case conversions.

**Special JS Features or Syntax**

There's no special JavaScript feature or syntax being used in this benchmark. The focus is solely on comparing two simple sorting approaches using standard JavaScript techniques.

**Other Alternatives**

If you wanted to add more complexity to your benchmark, here are some alternative options:

1.  **Using locale-specific sorting**: You could modify the benchmark to use locale-specific sorting methods (e.g., `String.prototype.localeCompare()`), which can provide better support for languages with non-ASCII characters and complex case rules.
2.  **Sorting numeric values**: Instead of sorting names, you could sort an array of numbers or other numeric types, such as dates or timestamps.
3.  **Multi-threaded sorting**: You could modify the benchmark to use multi-threading techniques (e.g., Web Workers) to take advantage of multiple CPU cores and measure the performance benefits.
4.  **JSON parsing efficiency**: You could create a new benchmark that compares the efficiency of different JSON parsing methods or libraries.

To add these alternatives, you would need to update the `Script Preparation Code` section with new sorting logic, modify the `Html Preparation Code` (if applicable) to accommodate any changes in user input or data sources, and prepare new individual test cases to reflect the updated benchmark.

Related benchmarks:

lowerCase() vs upperCase() (version: 0)

Comparing performance of: lowerCase vs upperCase

Created: 5 years ago by: Guest

Jump to the latest result

lowerCase

upperCase

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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