Benchmark: Some vs. indexOf v2

Script Preparation code:

var currencies = ["rub", "usd", "qwe", "www", "zzz", "eur"];
var payments = [{currency: "rub", amount: 99, fee: 88},
                   {currency: "usd", amount: 99, fee: 88},
                   {currency: "peso", amount: 99, fee: 88},
                   {currency: "eur", amount: 99, fee: 88},
                   {currency: "hrk", amount: 99, fee: 88},
                   {currency: "yht", amount: 99, fee: 88},
                   {currency: "kht", amount: 99, fee: 88}];

Tests:

Array.some
var tempResult = payments.filter(payment => currencies.some(elem => elem === payment.currency));
Array.indexOf
var tempResult = payments.filter(x => currencies.indexOf(x.currency) === 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.some
Array.indexOf

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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**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmarking test case on the MeasureThat.net website. The benchmark compares the performance of two approaches to filter an array in JavaScript: `Array.some()` and `Array.indexOf()`. We'll break down each option, their pros and cons, and discuss any relevant libraries or special features.

**Options Compared**

1. **Array.some()**: This method returns `true` if at least one element of the array satisfies the provided testing function.
2. **Array.indexOf()**: This method returns the index of the first element that satisfies the provided testing function. If no such element exists, it returns -1.

**Pros and Cons**

* **Array.some()**:
	+ Pros: Generally faster and more concise than `Array.indexOf()`.
	+ Cons: May have a higher overhead due to the use of a callback function.
* **Array.indexOf()**:
	+ Pros: Can be more efficient when only one element needs to be found, as it returns immediately once the first match is found.
	+ Cons: Requires an initial pass over the entire array, making it slower than `Array.some()` for large datasets.

**Library and Purpose**

In the provided benchmark definition JSON, the `currencies` and `payments` arrays are used. The `currencies` array appears to be a list of currency codes, while the `payments` array contains objects with `currency`, `amount`, and `fee` properties. There is no explicitly stated library being used in this benchmark.

**Special JS Features**

There doesn't appear to be any special JavaScript features or syntax being utilized in this benchmark. The code uses standard JavaScript syntax and conventions.

**Other Alternatives**

If you need to filter an array in JavaScript, other alternatives include:

* Using a regular expression (e.g., `Array.filter(x => /^[a-zA-Z]+$/i.test(x.currency))`)
* Using the `every()` method (e.g., `Array.every(payment => currencies.includes(payment.currency))`)
* Using a custom function with a callback (e.g., `Array.map().then(arr => arr.filter(payment => currencies.includes(payment.currency)))`)

Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the `Array.some()` and `Array.indexOf()` methods.

Related benchmarks:

Some vs. indexOf v2 (version: 0)

Comparing performance of: Array.some vs Array.indexOf

Created: 6 years ago by: Guest

Jump to the latest result

Array.some

Array.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):