Benchmark: Find vs Reduce - MeasureThat.net

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

reducing-to-value
const arr = [ { type: "element", attributes: [ { key: "aid", value: "215-001-01" }, { key: "class", value: "mug-card-4" } ] }, { type: "element", attributes: [ { key: "aid", value: "215-001-02" }, { key: "class", value: "mug-card-4" } ] }, ]; let reduced = arr.reduce((prev,curr) => { return curr.key === "aid" ? curr : prev }, null)
find-value
const arr = [ { type: "element", attributes: [ { key: "aid", value: "215-001-01" }, { key: "class", value: "mug-card-4" } ] }, { type: "element", attributes: [ { key: "aid", value: "215-001-02" }, { key: "class", value: "mug-card-4" } ] }, ]; let found = arr.find((ele) => { return ele.key === "aid" ? ele : null })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reducing-to-value
find-value

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36

Browser/OS: Chrome 95 on Windows

View result in a separate tab

Test name	Executions per second
reducing-to-value	1429960.4 Ops/sec
find-value	1433133.5 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares two approaches to find an element in an array: `find` and `reduce`. The test cases are identical, but they use different methods to achieve the same goal.

**Script Preparation Code**

The HTML preparation code includes a script tag that loads the Lodash library (version 4.17.5) from a CDN. This suggests that the benchmark may be testing the performance of different libraries or implementations for the `find` and `reduce` functions.

**Individual Test Cases**

There are two test cases:

1. **"reducing-to-value"`**
This test case uses the `reduce` method to iterate through the array and find an element with a specific key (`aid`). The implementation is as follows:
```javascript
let reduced = arr.reduce((prev, curr) => {
  return curr.key === "aid" ? curr : prev;
}, null);
```
The intention is to return the first element that matches the condition, or `null` if no match is found.

2. **"find-value"`**
This test case uses the `find` method to achieve the same goal as the previous test case:
```javascript
let found = arr.find((ele) => {
  return ele.key === "aid" ? ele : null;
});
```
**Comparison**

Both tests aim to find an element in the array with a specific key (`aid`). However, they use different methods:

* `reduce`: Iterates through the array, accumulating the results until it finds a match.
* `find`: Searches for the first matching element.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

* **Reduce**:
	+ Pros:
		- Can be more efficient if the array is large and the condition is simple.
		- Allows for accumulation of results, which might be useful in certain scenarios.
	+ Cons:
		- Requires initializing a callback function with an initial value (in this case, `null`).
		- May have higher overhead due to the iteration and accumulator management.
* **Find**:
	+ Pros:
		- Typically faster and more efficient for small arrays or simple conditions.
		- Returns the first match immediately, without accumulating results.
	+ Cons:
		- May not be suitable for large arrays or complex conditions.

**Library: Lodash**

The benchmark includes a reference to the Lodash library, which provides implementations of various functional programming utilities. In this case, it's used for the `find` function implementation. Lodash is widely used in JavaScript development and offers a comprehensive set of utility functions that can simplify code and improve performance.

**Special JS Features or Syntax**

There are no special JS features or syntaxes explicitly mentioned in the benchmark. However, the use of Lodash's `find` function implies that it's using a specific implementation for this particular method, which might be worth exploring further if you're interested in optimizing JavaScript performance.

**Alternatives**

If you'd like to explore alternative approaches or libraries for finding elements in an array, here are some options:

* Vanilla JavaScript: You can use the `some` and `forEach` methods to achieve similar results.
* Other libraries: Consider using libraries like `lodash` (which is already used in this benchmark), ` Ramda`, or `Underscore.js` for functional programming utilities.

Keep in mind that the choice of library or implementation depends on your specific use case, performance requirements, and personal preferences.

Related benchmarks:

Find vs Reduce (version: 0)

Comparing performance of: reducing-to-value vs find-value

Created: 3 years ago by: Registered User

Jump to the latest result

reducing-to-value

find-value

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):