Benchmark: String.includes vs String.match vs String.indexOf

Tests:

String.includes
const testStrFirst = 'foo'; "foo|bar".includes(testStrFirst); const testStrSecond = 'bar'; "foo|bar".includes(testStrSecond); const testStrNotMatch = 'baz'; "foo', 'bar'".includes(testStrNotMatch);
String.match
const testStrFirst = 'foo'; testStrFirst.match(/^(foo|bar)$/); const testStrSecond = 'bar'; testStrSecond.match(/^(foo|bar)$/); const testStrNotMatch = 'baz'; testStrNotMatch.match(/^(foo|bar)$/);
String.indexOf
const testStrFirst = 'foo'; "foo|bar".indexOf(testStrFirst); const testStrSecond = 'bar'; "foo|bar".indexOf(testStrSecond); const testStrNotMatch = 'baz'; "foo', 'bar'".indexOf(testStrNotMatch);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String.includes
String.match
String.indexOf

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 break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**What is being tested?**

The benchmark tests three different approaches for searching a substring within a string: `String.includes`, `String.match`, and `String.indexOf`. These methods are used to find the presence of a specific pattern or substring within a string.

**Options compared:**

1.  **`String.includes`**: This method uses the "in" operator to check if a specified value (the substring) is present in a string. It returns true if the value is found, and false otherwise.
2.  **`String.match`**: This method uses a regular expression engine to search for a match within a string. The regular expression pattern is used to define what constitutes a match.
3.  **`String.indexOf`**: This method finds the index of the first occurrence of a substring within a string. If the substring is not found, it returns -1.

**Pros and Cons:**

*   `String.includes`:
    *   Pros:
        *   Simple to use
        *   Fast
        *   Does not require regular expressions
    *   Cons:
        *   Can be slow if used with large strings or complex patterns
        *   May not work correctly for certain characters (e.g., Unicode)
*   `String.match`:
    *   Pros:
        *   More powerful and flexible than includes and indexOf, allowing for regular expression patterns
        *   Can handle Unicode characters
    *   Cons:
        *   Requires knowledge of regular expressions, which can be complex to learn and use
        *   May be slower than includes and indexOf due to the added complexity
*   `String.indexOf`:
    *   Pros:
        *   Fast and efficient for finding a substring within a string
        *   Does not require regular expressions
    *   Cons:
        *   Returns an index, which may not be what the user expects if they're looking for a boolean result

**Library and syntax considerations:**

*   The benchmark uses no external libraries other than JavaScript's built-in `String` methods.
*   No special JavaScript features or syntax are used beyond regular expressions (in the case of `String.match`).

**Other alternatives:**

*   Regular expression engines like `RegExp` in JavaScript provide more advanced pattern matching capabilities but can be slower and more complex to use.
*   Other programming languages may have different string searching methods, such as `strpos` or `find`, which could potentially offer similar performance to the above options.

In summary, this benchmark compares three built-in JavaScript methods for finding a substring within a string. While each method has its advantages and disadvantages, understanding their differences is essential for choosing the right approach for specific use cases.

Related benchmarks:

String.includes vs String.match vs String.indexOf (version: 0)

Comparing performance of: String.includes vs String.match vs String.indexOf

Created: 3 years ago by: Guest

Jump to the latest result

String.includes

String.match

String.indexOf

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):