Benchmark: custom isNaN perf

Script Preparation code:

var arr = []
for (var i = 0; i < 10000000; i++) {
    arr.push(i);
}

Tests:

isNaN
arr.forEach(i => typeof i === 'number' && !isNaN(i))
custom isNaN
arr.forEach(i => typeof i === 'number' && !(!(i <= 0) && !(i > 0)))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isNaN
custom isNaN

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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**What is tested?**

The provided JSON represents two test cases for JavaScript benchmarks:

1. `custom isNaN`: This benchmark tests the performance of a custom implementation of the `isNaN` function, which checks if a value is not a number.
2. `isNaN`: This benchmark tests the built-in `isNaN` function in JavaScript.

**Options compared**

The two options being compared are:

* Built-in `isNaN` function
* Custom implementation of `isNaN`

**Pros and Cons:**

### Built-in `isNaN` function

Pros:

* Typically implemented in native code, making it faster and more efficient than custom implementations.
* Widely supported across different browsers and platforms.

Cons:

* May have issues with certain edge cases or non-standard input data types (e.g., NaN, Infinity).
* Not explicitly defined in the ECMAScript standard, which might lead to differences in behavior between browsers.

### Custom implementation of `isNaN`

Pros:

* Can be optimized for specific use cases or input data types.
* Provides more explicit control over the logic and edge case handling.
* Might perform better in certain scenarios due to custom optimizations.

Cons:

* Typically implemented in JavaScript, which can lead to slower performance compared to native code implementations.
* Requires careful consideration of edge cases and potential issues (e.g., NaN, Infinity).

**Library usage**

There is no library mentioned in the provided JSON. However, if a library was used, it would likely be a third-party library that provides an implementation of the `isNaN` function or related functionality.

**Special JS feature or syntax**

The custom implementation of `isNaN` uses a concise syntax with arrow functions: `arr.forEach(i => typeof i === 'number' && !isNaN(i))`. This syntax is supported in modern JavaScript implementations (ECMAScript 2015 and later).

Related benchmarks:

custom isNaN perf (version: 0)

Comparing performance of: isNaN vs custom isNaN

Created: 3 years ago by: Guest

Jump to the latest result

isNaN

custom isNaN

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):