Benchmark: case insensitive array check

Script Preparation code:

var rawArray = [{ key: "Apple" }, { key: "bat" }, { key: "CAT" }];
var lowerArray = rawArray.map(x => ({ key: x.key.toLowerCase() }));
var map = lowerArray.reduce((prev, curr) => ({ ...prev, [curr.key]: curr }));

var testItem = "CaT";

Tests:

Regex
const re = new RegExp(`^${testItem}$`, "i"); const val = rawArray.find(x => re.test(x.key));
ToLower
const val = lowerArray.find(x => x.key === testItem);
Map
const val = map[testItem];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regex
ToLower
Map

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of MeasureThat.net.

**Benchmark Definition JSON**

The provided JSON represents a benchmark test case that checks for case-insensitive array values in three different ways:

1.  **Map Approach**: The `map` function is used to create a new array with the lowercase version of each key in the original array. Then, the `reduce` method is used to merge this new array into a single object. This approach creates a new data structure and performs an operation on it.
2.  **ToLower Approach**: This approach uses the `toLowerCase()` method directly on the individual elements of the original array, similar to the `map` function in the previous step. However, instead of merging the results, it simply finds the first match with the specified value using the `find()` method.
3.  **Regex Approach**: A regular expression is created that matches any string starting and ending with the specified test item (`testItem`). The `find()` method is then used to search for an element in the original array that satisfies this condition.

**Options Compared**

The benchmark compares the performance of these three approaches:

*   **Map Approach**: It creates a new data structure and performs an operation on it.
*   **ToLower Approach**: It uses a simple iteration approach with the `find()` method, which is relatively lightweight compared to the map approach.
*   **Regex Approach**: It uses regular expressions for pattern matching.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1.  **Map Approach**: Pros:
    *   Easier to understand and maintain due to its functional programming style.
    *   More flexible, as it can be easily extended or modified.

Cons:
    *   Creates a new data structure, which can lead to performance overhead.
    *   May not be suitable for very large datasets.
2.  **ToLower Approach**: Pros:
    *   Lightweight and efficient due to the simple iteration approach.
    *   Does not create an additional data structure, making it more memory-friendly.

Cons:
    *   Less readable and maintainable compared to the map approach.
    *   May be less flexible for custom use cases.
3.  **Regex Approach**: Pros:
    *   Suitable for pattern matching and can be extended with regular expression features.

Cons:
    *   Can be slow due to the complexity of regular expressions.
    *   Less intuitive and readable compared to other approaches.

**Library Usage**

There is no explicit library mentioned in the benchmark definition. However, if we consider the `find()` method used in all three approaches, it implies that the JavaScript built-in methods are being utilized. No external libraries are required for this specific test case.

**Special JS Features or Syntax**

None of the provided code snippets utilize any special JavaScript features or syntax beyond what is standard (e.g., `const`, `let`, `var`, arrow functions, and basic operators).

**Alternatives**

Other alternatives to measure the performance of case-insensitive array checks could include:

*   Using an array data structure with built-in methods for filtering or searching (e.g., `Array.prototype.includes()`)
*   Implementing a custom search algorithm using bitwise operations
*   Utilizing a different data structure, such as a Trie or a hash table

MeasureThat.net's approach provides a straightforward and easy-to-understand benchmarking framework for comparing the performance of different algorithms.

Related benchmarks:

case insensitive array check (version: 0)

Comparing performance of: Regex vs ToLower vs Map

Created: 3 years ago by: Guest

Jump to the latest result

Regex

ToLower

Map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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