Benchmark: arr vs indexaction

Tests:

indexation

let arr = {}

for (let i=0; i<500; i++) {
arr = { ...arr, [+i]: { id: +i, foo: 'bar'}}
}

const test = arr[40]

​x
 
let arr = {}​for (let i=0; i<500; i++) {arr = { ...arr, [+i]: { id: +i, foo: 'bar'}}}​const test = arr[40]

arr

const arr = []

for (let i=0; i<500; i++) {
arr.push({ id: +i, foo: 'bar'})
}

const test = arr.find(x => x.id === 40)

 
const arr = []​for (let i=0; i<500; i++) {arr.push({ id: +i, foo: 'bar'})}​const test = arr.find(x => x.id === 40)

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
indexation
arr

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
indexation	24273.1 Ops/sec
arr	682542.1 Ops/sec

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

Benchmark Explanation

MeasureThat.net is designed to compare the performance of two approaches: accessing an array using its index or using the Array.prototype.indexOf() method.

The benchmark is testing which approach is faster for two specific test cases:

Accessing an array using its index: In this test case, a new object is added to the end of an empty array 500 times, and then the value at index 40 is accessed. This simulates a scenario where you need to access a random element in an array.
Using Array.prototype.indexOf() method: In this test case, an array is populated with objects and then the find() method is used to find the object with a specific id (in this case, 40).

Options Compared

The two approaches being compared are:

Accessing an array using its index:
- Pros: Fast and simple.
- Cons: Can be slow for large arrays because it requires calculating the index every time.
Using Array.prototype.indexOf() method:
- Pros: More efficient than accessing the array directly, especially for larger arrays.
- Cons: Requires calling a method on the array, which can incur overhead.

Library and Special JS Features

In this benchmark, there is no library being used. However, the find() method is being compared to direct array access using an index.

Other Considerations

When deciding between these two approaches, consider the following factors:

How often will you need to access random elements in your array?
What are the performance implications of calling a method on your array?

Alternatives

If you're working with arrays and need to decide whether to use direct access or indexOf(), here are some alternatives to consider:

Using map() instead of pushing: If you need to perform an operation on each element in the array, using map() can be more efficient than pushing elements onto the end of the array.
Using forEach() instead of accessing the array directly: Similar to map(), using forEach() can be faster than accessing the array directly for iterative operations.

Keep in mind that these alternatives will depend on the specific use case and requirements of your application.

LLMs can make mistakes. Check important info.

**Benchmark Explanation**

MeasureThat.net is designed to compare the performance of two approaches: accessing an array using its index or using the Array.prototype.indexOf() method.

The benchmark is testing which approach is faster for two specific test cases:

1. **Accessing an array using its index**: In this test case, a new object is added to the end of an empty array 500 times, and then the value at index 40 is accessed. This simulates a scenario where you need to access a random element in an array.
2. **Using Array.prototype.indexOf() method**: In this test case, an array is populated with objects and then the `find()` method is used to find the object with a specific id (in this case, 40).

**Options Compared**

The two approaches being compared are:

1. **Accessing an array using its index**:
	* Pros: Fast and simple.
	* Cons: Can be slow for large arrays because it requires calculating the index every time.
2. **Using Array.prototype.indexOf() method**:
	* Pros: More efficient than accessing the array directly, especially for larger arrays.
	* Cons: Requires calling a method on the array, which can incur overhead.

**Library and Special JS Features**

In this benchmark, there is no library being used. However, the `find()` method is being compared to direct array access using an index.

**Other Considerations**

When deciding between these two approaches, consider the following factors:

* How often will you need to access random elements in your array?
* What are the performance implications of calling a method on your array?

**Alternatives**

If you're working with arrays and need to decide whether to use direct access or `indexOf()`, here are some alternatives to consider:

1. **Using `map()` instead of pushing**: If you need to perform an operation on each element in the array, using `map()` can be more efficient than pushing elements onto the end of the array.
2. **Using `forEach()` instead of accessing the array directly**: Similar to `map()`, using `forEach()` can be faster than accessing the array directly for iterative operations.

Keep in mind that these alternatives will depend on the specific use case and requirements of your application.

Related benchmarks:

arr vs indexaction (version: 0)

Comparing performance of: indexation vs arr

Created: one year ago by: Guest

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