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")

AخA
 
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")

 
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")

 
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

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
one liner
reduced
reduced clean

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:72.0) Gecko/20100101 Firefox/72.0

Browser/OS: Firefox 72 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
one liner	78262.7 Ops/sec
reduced	222775.6 Ops/sec
reduced clean	50012.7 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

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:

arrayToObject function that takes two parameters: arr (the input array) and keyField (the key to use for object property names).
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:

"one liner" - This test case runs the original implementation of arrayToObject with two parameters: arr and keyField.
"reduced" - This test case runs a modified version of the arrayToObject function using the reduce method.
"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:

arrayToObject (original implementation):
- Pros: Easy to understand, well-documented syntax.
- Cons: May be slower due to more verbose code.
reduced:
- Pros: More concise, potentially faster.
- Cons: May be harder to read and understand for some developers.
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.

LLMs can make mistakes. Check important info.

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: 5 years ago by: Guest

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