Benchmark: array to obj by key value advanced

Tests:

one liner
const peopleArray = [ { id: 123, name: "dave", age: 23 }, { id: 456, name: "chris", age: 23 }, { id: 789, name: "bob", age: 23 }, { id: 101, name: "tom", age: 23 }, { id: 102, name: "tim", age: 23 } ] const arrayToObject = (arr, keyField) => Object.assign({}, ...arr.map(item => ({[item[keyField]]: item}))) const peopleObject = arrayToObject(peopleArray, "id")
reduced
const peopleArray = [ { id: 123, name: "dave", age: 23 }, { id: 456, name: "chris", age: 23 }, { id: 789, name: "bob", age: 23 }, { id: 101, name: "tom", age: 23 }, { id: 102, name: "tim", age: 23 } ] const arrayToObject = (array, keyField) => array.reduce((obj, item) => { obj[item[keyField]] = item return obj }, {}) const peopleObject = arrayToObject(peopleArray, "id")
reduced clean
const peopleArray = [ { id: 123, name: "dave", age: 23 }, { id: 456, name: "chris", age: 23 }, { id: 789, name: "bob", age: 23 }, { id: 101, name: "tom", age: 23 }, { id: 102, name: "tim", age: 23 } ] const arrayToObject = (array, keyField) => array.reduce((acc, curr) => ({ [curr[keyField]]: curr, ...acc }), {}) const peopleObject = arrayToObject(peopleArray, "id")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
one liner
reduced
reduced clean

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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I'll break down the benchmark definition and test cases to explain what's being tested, compared, and its implications.

**Benchmark Definition**

The benchmark is testing the performance of converting an array into an object using different methods.

In this specific case, there are three variants:

1. `arrayToObject` function that takes two parameters: `arr` (the input array) and `keyField` (the key to use for object property names).
2. Two variations of the `arrayToObject` function:
	* `reduced`: uses the `reduce` method to iterate over the array.
	* `reduced clean`: uses a more concise syntax to achieve the same result.

**Test Cases**

Each test case represents a separate execution of the benchmark, measuring the performance of one of the three variants.

In this example, there are three test cases:

1. "one liner" - This test case runs the original implementation of `arrayToObject` with two parameters: `arr` and `keyField`.
2. "reduced" - This test case runs a modified version of the `arrayToObject` function using the `reduce` method.
3. "reduced clean" - This test case runs another variation of the `arrayToObject` function that achieves the same result in a more concise syntax.

**Comparison**

The main comparison here is between the three variants of the `arrayToObject` function:

* **Performance**: The `one liner` and `reduced clean` variants are likely to be faster since they use a single expression or a shorter syntax, which can lead to better performance optimization.
* **Readability**: The `reduced clean` variant is more concise but may sacrifice readability for the sake of brevity.

**Pros and Cons**

Here are some pros and cons for each approach:

1. `arrayToObject` (original implementation):
	* Pros: Easy to understand, well-documented syntax.
	* Cons: May be slower due to more verbose code.
2. `reduced`:
	* Pros: More concise, potentially faster.
	* Cons: May be harder to read and understand for some developers.
3. `reduced clean`:
	* Pros: Extremely concise, potentially very fast.
	* Cons: Readability may suffer, making it harder for other developers to maintain or modify the code.

**Library Considerations**

There are no libraries explicitly mentioned in the benchmark definition, but the use of the `reduce` method implies a familiarity with functional programming concepts.

**Special JS Features/Syntax**

The test cases do not use any special JavaScript features or syntax. They are written in standard ECMAScript 5+ syntax and rely on the built-in `Object.assign` method for creating an empty object.

**Alternatives**

If you wanted to benchmark alternative approaches, some potential alternatives could include:

* Using a different data structure, such as a map or a collection library.
* Implementing the conversion using a different algorithm, such as using a hash table or a trie.
* Comparing the performance of other programming languages or JavaScript engines.

Related benchmarks:

array to obj by key value advanced (version: 0)

array to obj by key value advanced

Comparing performance of: one liner vs reduced vs reduced clean

Created: 6 years ago by: Guest

Jump to the latest result

one liner

reduced

reduced clean

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):