Benchmark: startsWith vs === 2

Tests:

startsWith
'pseudo-class'.startsWith('pseudo')
===
'pseudo-class' === 'pseudo-class'

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
startsWith
===

Fastest: N/A

Slowest: N/A

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

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Let's break down the benchmark definition and test cases.

**Benchmark Definition:**

The provided JSON represents a benchmark definition with two test cases:

1. `pseudo-class.startsWith('pseudo')`
2. `pseudo-class === 'pseudo-class'`

Both test cases compare the result of calling the `startsWith` method on an object called `pseudo-class` with two different strings.

**Options Compared:**

In these test cases, we're comparing the performance of two options:

1. `startsWith`: a string method that checks if a specified value starts at the beginning of the current string.
2. `===`: a strict equality operator that checks for both value and type equality.

**Pros and Cons:**

*   **`startsWith`:**
    *   Pros:
        *   More intuitive for most use cases, as it stops checking once it reaches the end of the string.
        *   Less CPU-intensive than `===`, since it only needs to traverse a portion of the string.
    *   Cons:
        *   May be slower for very long strings or when the substring is not found at the beginning, since it requires additional checks.
*   `===`: 
    *   Pros:
        *   Faster for simple equality checks, as it can use caching and is less CPU-intensive.
        *   More suitable for certain use cases where type checking is essential (e.g., when working with primitive types).
    *   Cons:
        *   Less intuitive, since it performs both value and type checks.

**Library and Purpose:**

In the provided test case, no specific library is mentioned. However, JavaScript's built-in `String.prototype.startsWith()` method is used, which returns a boolean indicating whether the specified value starts at the beginning of the current string.

**Special JS Features/Syntax:**

There are no special features or syntaxes being tested in this benchmark definition. It primarily focuses on comparing the performance of the `startsWith` method versus the strict equality operator (`===`).

Related benchmarks:

startsWith vs === 2 (version: 0)

Comparing performance of: startsWith vs ===

Created: 3 years ago by: Guest

Jump to the latest result

startsWith

===

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):