Benchmark: string comparison vs array includes

Script Preparation code:

function stringCompare(x) {
  return x === '' || x === 'USA' || x === 'Canada' || x === 'Mexico' || x === 'UK' || x === 'Germany' || x === 'Sweden';
}

function arrayIncludes(x) {
  return ['', 'USA', 'Canada', 'Mexico', 'UK', 'Germany', 'Sweden'].includes(x);
}

Tests:

string compare
stringCompare('abc');
array includes
arrayIncludes('abc');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string compare
array includes

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser/OS: Firefox 135 on Linux

View result in a separate tab

Test name	Executions per second
string compare	130863728.0 Ops/sec
array includes	56881736.0 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 world of JavaScript microbenchmarks!

**Benchmark Definition**

The provided JSON represents a benchmark definition for measuring two different approaches to string comparison:

1. **stringCompare(x)**: This function takes a string `x` as input and returns `true` if it matches one of the predefined values (`''`, `'USA'`, `'Canada'`, `'Mexico'`, `'UK'`, `'Germany'`, or `'Sweden'`). Otherwise, it returns `false`.
2. **arrayIncludes(x)**: This function takes a string `x` as input and checks if it exists in an array containing the predefined values.

**Comparison of Options**

The two approaches differ in their implementation:

*   **stringCompare(x)**: This approach uses a simple equality check with a fixed set of values. It is straightforward to implement but may not be optimized for performance.
*   **arrayIncludes(x)**: This approach uses the `includes()` method, which is a built-in JavaScript method that checks if an element exists in an array.

**Pros and Cons**

*   **stringCompare(x)**:
    *   Pros:
        *   Simple to implement
        *   Easy to understand
    *   Cons:
        *   May not be optimized for performance due to the fixed set of values
        *   Not scalable for large datasets or dynamic values
*   **arrayIncludes(x)**:
    *   Pros:
        *   Optimized for performance, as it uses a binary search algorithm under the hood
        *   Scalable for large datasets and dynamic values
    *   Cons:
        *   May be slower due to the overhead of the `includes()` method
        *   Requires modern JavaScript versions (ES6+)

**Library Used**

The `includes()` method is a built-in JavaScript library, introduced in ES6. It uses a binary search algorithm to efficiently check if an element exists in an array.

**Special JS Feature or Syntax**

There are no special features or syntax used in this benchmark. The focus is on comparing two approaches to string comparison using simple and optimized methods.

**Alternatives**

If you want to explore alternative approaches, here are a few options:

*   **Regex-based approach**: You can use regular expressions to match the predefined values against the input string.
*   **Hashing approach**: You can create a hash table or object to store the predefined values and look up the corresponding result for each input string.
*   **Custom implementation**: You can implement your own custom algorithm, such as using a trie data structure, to efficiently compare strings.

Keep in mind that these alternatives may have varying performance characteristics compared to the `includes()` method.

Related benchmarks:

string comparison vs array includes (version: 0)

Comparing performance of: string compare vs array includes

Created: 4 years ago by: Guest

Jump to the latest result

string compare

array includes

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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