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>

Previous results

Test case name	Result
array find
array some

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Slowest: N/A

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

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Let's dive into the benchmark test case.

**What is being tested?**

The test case is comparing the performance of two JavaScript methods: `find()` and `some()`, which are used to search for an element in an array.

**What options are compared?**

Two options are being compared:

1. **Array.find()**: This method returns the first element in the array that satisfies a provided testing function. In this case, it's searching for an object with a specific `code` property (`"sm"`).
2. **Array.some()**: This method returns true if at least one element in the array satisfies a provided testing function. Again, it's searching for an object with a specific `code` property (`"sm"`).

**What are the pros and cons of each approach?**

1. **Array.find():**
	* Pros: Returns the first matching element, or undefined if no match is found.
	* Cons: May not be as efficient as some() if multiple matches exist in the array, since it stops searching once a match is found.
2. **Array.some():**
	* Pros: More efficient than find() when there are multiple matches in the array, since it continues searching until all elements have been checked.
	* Cons: Returns true or false, without providing the actual matching element.

**What library is used?**

None, this test case uses native JavaScript methods (`find()` and `some()`).

**Does the test case use special JS feature or syntax?**

No, it does not. The code uses standard JavaScript syntax and no specific features are being tested.

**Other alternatives?**

If you need to search for an element in an array, you can also consider using a simple loop:
```javascript
for (let i = 0; i < countries.length; i++) {
  if (countries[i].code === 'sm') {
    // do something with the matching object
  }
}
```
However, this approach may not be as concise or efficient as using `find()` or `some()`, especially for larger arrays.

Overall, the test case is a good example of how to compare the performance of different JavaScript methods and approaches when searching for an element in an array.

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 llama3.1:latest, generated one year ago):