Benchmark: filter vs object

Script Preparation code:

window.foo = {1: 'a', 2: 'b', 3: 'c'};
window.baz = ['a','b','c'];

Tests:

filter
baz.filter(i => i === 'c');
obj
foo[3]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
filter
obj

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition is a JSON object that provides information about the test case, including:

* `Name`: The name of the benchmark (in this case, "filter vs object").
* `Description`: A brief description of the benchmark, which is null in this case.
* `Script Preparation Code`: A code snippet that sets up some variables before running the benchmark. In this case, it defines two objects: `window.foo` with properties 1 to 3 and values 'a', 'b', and 'c' respectively, and `window.baz` as an array of strings ['a','b','c'].
* `Html Preparation Code`: An empty string, indicating that no HTML is required for this benchmark.

The benchmark definition specifies a test case that involves filtering an array using the `filter()` method and accessing an object property using bracket notation (`foo[3]`).

**Individual Test Cases**

There are two individual test cases:

1. **Filter**: The first test case runs the following JavaScript code: `baz.filter(i => i === 'c')`. This is a simple filtering operation that takes the array `baz` and returns an array containing only elements where `i` equals `'c'`.
2. **Obj (Object)**: The second test case runs the following JavaScript code: `foo[3]`. This accesses the fourth property of the object `foo`, which has value 'c'.

**Library Usage**

The benchmark uses two built-in JavaScript functions:

* `Array.prototype.filter()`: A method that creates a new array with all elements that pass the provided test.
* `Object.prototype.propertyName` (not explicitly mentioned, but implied by `window.foo[3]`): Accessing an object property using bracket notation.

**Special JavaScript Features or Syntax**

There is no special JavaScript feature or syntax being tested in this benchmark. The code uses only standard ECMAScript features.

**Pros and Cons of Different Approaches**

Here's a brief analysis of the two test cases:

1. **Filter**:
	* Pros: Filtering an array is a common operation, and comparing its performance can be useful.
	* Cons: This test case might not accurately represent real-world usage, as filtering arrays is often used in conjunction with other operations.
2. **Obj (Object)**:
	* Pros: Accessing object properties using bracket notation is a common operation, and this test case provides valuable insight into the performance of this particular syntax.
	* Cons: This test case might not be representative of real-world usage, as accessing object properties is often used in isolation from other operations.

**Other Alternatives**

If you were to modify this benchmark or create new ones, consider testing alternative scenarios, such as:

* Using different data structures (e.g., sets, maps)
* Incorporating more complex filtering conditions
* Adding noise to the input data
* Comparing performance across different browsers or versions

By exploring these alternatives, you can gain a deeper understanding of how JavaScript performs under various workloads and scenarios.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Browser/OS: Chrome 81 on Windows

View result in a separate tab

Test name	Executions per second
filter	5231083.5 Ops/sec
obj	6187139.5 Ops/sec

Related benchmarks:

filter vs object (version: 0)

Comparing performance of: filter vs obj

Created: 4 years ago by: Guest

Jump to the latest result

filter

obj

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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