Benchmark: array find vs _.find vs _.find (Array) vs _.find (Object)

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

array find
var a = [{name: 'hello', something: 1}, {name: 'a', something: 1}, {name: 'bc', something: 1}]; var b = a.find(item => item.name === 'bc');
_.find
var a = [{name: 'hello', something: 1}, {name: 'a', something: 1}, {name: 'bc', something: 1}]; var b = _.find(a, item => item.name === 'bc');
_.find (Object)
var a = [{name: 'hello', something: 1}, {name: 'a', something: 1}, {name: 'bc', something: 1}]; var b = _.find(a, {name: 'bc'});
_.find (Array)
var a = [{name: 'hello', something: 1}, {name: 'a', something: 1}, {name: 'bc', something: 1}]; var b = _.find(a, ['name', 'bc']);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array find
_.find
_.find (Object)
_.find (Array)

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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Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The benchmark is designed to compare four different approaches for finding an element in an array:

1. **`_.find()`**: A function from the Lodash library that finds the first element in an array that satisfies a predicate.
2. **`.find()`**: A built-in JavaScript method that does the same thing as `_.find()`.
3. **`.find()` with object literal**: Similar to `.find()`, but uses an object literal instead of a function.
4. **`.find()` with array literal**: Similar to `.find() with object literal`, but uses an array literal instead.

**Options Compared**

The benchmark compares the performance of these four approaches on an array of objects, where each object has a `name` property that we want to search for. The options are compared in terms of their execution time per iteration.

**Pros and Cons of Each Approach**

1. **`.find()`**: This approach is simple and easy to read, but it can be slower than the others because it requires creating an iterator object.
2. **`_.find()`**: This approach is optimized for performance and uses a more efficient algorithm than `.find()`.
3. **`.find()` with object literal**: This approach is similar to `.find()`, but uses an object literal instead of a function. It can be slower because the JavaScript engine needs to parse the object literal.
4. **`.find()` with array literal**: This approach is similar to `.find()` with object literal, but uses an array literal instead. It can also be slower due to parsing.

**Libraries Used**

The benchmark uses Lodash (version 4.17.5) as a dependency. Specifically, it uses the `lodash.core` module for the `_` alias.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax used in this benchmark.

**Other Considerations**

* The benchmark is run on Chrome 88 with a Mac OS X 11.2.0 platform.
* The results show that `.find()` and `_.find()` are generally faster than the other two approaches.
* The `find()` with object literal and array literal approaches can be slower due to parsing.

**Alternatives**

If you're interested in exploring alternative approaches, here are some options:

* Use `Array.prototype.findIndex()` instead of `_.find()`. This method is similar but returns `-1` if no element is found.
* Use a custom loop with indexing instead of the built-in `.find()` or Lodash methods. This can be slower and more verbose.
* Compare performance using other benchmarking tools, such as Benchmark.js or Jest.

I hope this explanation helps you understand the MeasureThat.net benchmark!

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Created: 5 years ago by: Guest

Jump to the latest result

array find

_.find

_.find (Object)

_.find (Array)

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):