Benchmark: Remove element by key in array with objects

Tests:

Filter
let sockets = [{ conversation: "1"},{ conversation: "2"}, { conversation: "3"}, { conversation: "5"}, { conversation: "5"} ] const removeWebsocketEntryByConversation = (conversation) => { sockets = sockets.filter((ele) => ele.conversation !== conversation); } removeWebsocketEntryByConversation("2");
findIndex and splice
let sockets = [{ conversation: "1"},{ conversation: "2"}, { conversation: "3"}, { conversation: "5"}, { conversation: "5"} ] const removeWebsocketEntryByConversation = (conversation) => { sockets.splice(sockets.findIndex(v => v.conversation === conversation), 1); } removeWebsocketEntryByConversation("2");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Filter
findIndex and splice

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36

Browser/OS: Chrome 91 on Linux

View result in a separate tab

Test name	Executions per second
Filter	17277668.0 Ops/sec
findIndex and splice	12142684.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net, where JavaScript microbenchmarks are used to measure the performance of various programming approaches.

**Benchmark Overview**

MeasureThat.net provides a benchmarking framework that allows users to create and run JavaScript microbenchmarks. In this case, we have two test cases: "Filter" and "findIndex and splice". Both tests aim to measure the performance of removing an element from an array by key in objects.

**Options Compared**

The two options being compared are:

1. **Using the `filter()` method**: This approach iterates over the array using a callback function, checking each element's key against the target value. If a match is found, the element is excluded from the resulting array.
2. **Using `findIndex` and `splice()`**: This approach uses the `findIndex` method to find the index of the element with the matching key, then uses `splice` to remove that element from the array.

**Pros and Cons**

### Filter Method

Pros:

* Simple and concise syntax
* Easy to understand for developers familiar with JavaScript arrays
* Does not modify the original array (returns a new array)

Cons:

* Has a higher overhead due to iterating over the entire array using a callback function
* May be slower than `findIndex` and `splice` due to this iteration

### findIndex and splice Method

Pros:

* More efficient since it only iterates over the elements until finding the match (not over the entire array)
* Can be faster for larger arrays or complex filtering scenarios

Cons:

* Requires knowing the index of the element to remove, which can be a limitation
* Modifies the original array, which might not be desirable in all cases

**Library: None**

There are no external libraries used in these benchmark definitions. The `filter()` method is a built-in JavaScript function, and `findIndex` and `splice` are also native methods.

**Special JS Feature/Syntax:**

None mentioned.

**Other Considerations**

When choosing between these approaches, consider the size of your array, the complexity of your filtering scenario, and whether modifying the original array is acceptable. If you need to filter large datasets or perform complex filtering, `findIndex` and `splice` might be a better choice. For simpler scenarios, the `filter()` method could be sufficient.

**Alternative Approaches**

Other approaches for removing elements from an array by key in objects include:

* Using `Array.prototype.map()` and then collecting the results with `Array.prototype.concat()`
* Using `Array.prototype.reduce()` to build a new array with the desired elements
* Using a custom loop or recursion (though this is generally less efficient)

These alternative approaches may be more suitable for specific use cases, but they might also come with trade-offs in terms of performance and readability.

Related benchmarks:

Remove element by key in array with objects (version: 0)

Comparing performance of: Filter vs findIndex and splice

Created: 3 years ago by: Registered User

Jump to the latest result

Filter

findIndex and splice

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):