Benchmark: isFinite vs Number isFinite

Tests:

isFinite
let numberString = "123" console.log(isFinite(numberString))
Number.isfinite
let numberString = "123" let testNum = Number(numberString) console.log(Number.isFinite(testNum))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isFinite
Number.isfinite

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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I'll explain what's being tested in the provided JSON.

**Overview**

The benchmark is comparing two approaches to check if a string can be converted to a finite number in JavaScript:

1. `isFinite()`: This method checks if a value is finite (not NaN or Infinity).
2. `Number.isFinite()`: This method is an alias for `isFinite()` and does the same check.

**Options being compared**

The two options are:

* Using `isFinite()` directly on a string (`"123"` in this case)
* Converting the string to a number using `Number()` before checking with `isFinite()` or `Number.isFinite()`

**Pros and Cons of each approach:**

1. **`isFinite()`**:
	* Pros:
		+ Can be used directly on strings without additional conversions.
		+ May be slightly faster since it only needs to perform a single check.
	* Cons:
		+ May produce incorrect results for non-numeric strings, which can lead to unexpected behavior.
		+ Not explicitly documented as being safe for use with strings.
2. **`Number.isFinite()`** (or `isFinite()` via alias):
	* Pros:
		+ Explicitly checks if the value is finite and throws a TypeError if it's not.
		+ Generally considered safer than using `isFinite()` directly on strings.
	* Cons:
		+ Requires an additional conversion step, which may be slower.

**Library usage**

There doesn't seem to be any explicit library usage in these benchmarks. However, note that `Number.isFinite()` is a part of the JavaScript Standard Library (ECMAScript), so it's built-in and doesn't require any external dependencies.

**Special JS feature or syntax**

This benchmark uses none of special JavaScript features or syntax that might affect the outcome of the test.

**Other alternatives**

If you were to modify these benchmarks, here are some alternative approaches you could consider:

* Using `typeof` operator to check if a variable is a number before calling `isFinite()`:
```javascript
if (typeof numberString === 'number') {
  console.log(isFinite(numberString));
}
```
* Using a library like Lodash or Ramda that provides more functional programming utilities, such as `isaNumber()`:
```javascript
const _ = require('lodash');

console.log(_.isaNumber(numberString));
```
However, these alternatives might not be relevant to the specific purpose of this benchmark.

Keep in mind that benchmarking is all about measuring performance under specific conditions. If you have a different use case or scenario, these alternatives might become more relevant.

Related benchmarks:

isFinite vs Number isFinite (version: 0)

Comparing performance of: isFinite vs Number.isfinite

Created: 2 years ago by: Registered User

Jump to the latest result

isFinite

Number.isfinite

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):