Benchmark: find vs some for objects

Script Preparation code:

var countries = [
    { name: 'Austria', code: 'AT' },
    { name: 'Belgium', code: 'BE' },
    { name: 'Bulgaria', code: 'BG' },
    { name: 'Cyprus', code: 'CY' },
    { name: 'Czech Republic', code: 'CZ' },
    { name: 'Denmark', code: 'DK' },
    { name: 'Estonia', code: 'EE' },
    { name: 'Finland', code: 'FI' },
    { name: 'France', code: 'FR' },
    { name: 'Germany', code: 'DE' },
    { name: 'Greece', code: 'GR' },
    { name: 'Hungary', code: 'HU' },
    { name: 'Ireland', code: 'IE' },
    { name: 'Italy', code: 'IT' },
    { name: 'Latvia', code: 'LV' },
    { name: 'Lithuania', code: 'LT' },
    { name: 'Luxembourg', code: 'LU' },
    { name: 'Malta', code: 'MT' },
    { name: 'Netherlands', code: 'NL' },
    { name: 'Poland', code: 'PL' },
    { name: 'Portugal', code: 'PT' },
    { name: 'Romania', code: 'RO' },
    { name: 'Slovakia', code: 'SK' },
    { name: 'Slovenia', code: 'SI' },
    { name: 'Spain', code: 'ES' },
    { name: 'Sweden', code: 'SE' },
    { name: 'United Kingdom', code: 'GB' },
    { name: 'Iceland', code: 'IS' },
    { name: 'Liechtenstein', code: 'LI' },
    { name: 'Norway', code: 'NO' },
    { name: 'Croatia', code: 'HR' },
    { name: 'United States', code: 'US' },
    { name: 'San Marino', code: 'SM' },
    { name: 'Switzerland', code: 'CH' },
    { name: 'Monaco', code: 'MC' },
    { name: 'Andorra', code: 'AD' },
    { name: 'Isle of Man', code: 'IM' },
    { name: 'Gibraltar', code: 'GI' },
];

Tests:

array find
var res = countries.find(item => item.code.toLowerCase() === 'sm');
array some
var res = countries.some(item => item.code.toLowerCase() === 'sm');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

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Test case name	Result
array find
array some

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Slowest: N/A

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Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

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This benchmark compares the performance of two methods for finding specific data within an array: `find` and `some`.

Here's a breakdown:

**Options Compared:**

* **`find(callback)`:** This method iterates through the array, executing the provided callback function for each element. If the callback returns a truthy value (indicating a match), `find` immediately returns that element. Otherwise, it returns `undefined`.
* **`some(callback)`:** Similar to `find`, this method also iterates through the array and calls the callback function for each element. However, `some` only checks if *at least one* element satisfies the condition specified in the callback. It returns `true` if a match is found, and `false` otherwise.

**Pros & Cons:**

| Method        | Pros                                   | Cons                             |
|---------------|------------------------------------------|-----------------------------------|
| `find()`      | Returns the exact matching element      |  Can iterate through the entire array even if a match is found early |
| `some()`     | Efficient for checking existence of a match | Doesn't return the matching element, only a boolean value |

**Considerations:**

* **Use Case:** If you need to retrieve the specific element that matches your criteria, use `find()`. 
* **Early Exit:** Both methods can potentially exit early if a match is found quickly. `find()` will stop after returning the first match, while `some()` will return `true` and continue iterating only if no match is found initially.

**Other Alternatives:**

While not explicitly tested in this benchmark, there are other approaches to finding specific elements in an array:

* **`.indexOf()`:** Returns the index of the first occurrence of a given element. It doesn't execute a callback function.
* **`filter()`:**  Creates a new array containing only elements that satisfy a specified condition (similar to `find()` but returns a new array).

Let me know if you have any further questions!

Related benchmarks:

find vs some for objects (version: 0)

test performance of find versus some

Comparing performance of: array find vs array some

Created: 2 years ago by: Guest

Jump to the latest result

array find

array some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):