Benchmark: indexOf versus object 4

Script Preparation code:

var a = ["test1", "test2", "test3", "test4"];
var b = {"test1": 0, "test2": 1, "test3": 2, "test4": 3}

Tests:

indexOf
return a.indexOf('test4')
object
return b['test4']

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
object

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Windows

View result in a separate tab

Test name	Executions per second
indexOf	10142445.0 Ops/sec
object	8257231.5 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**
The benchmark definition is a JSON object that specifies the test case to be executed. In this case, there are two test cases:

1. `indexOf`
2. `object`

**Script Preparation Code**
The script preparation code defines two variables:
```javascript
var a = ["test1", "test2", "test3", "test4"];
var b = {"test1": 0, "test2": 1, "test3": 2, "test4": 3};
```
These variables are used as the input data for both test cases.

**Test Cases**

### 1. `indexOf`

This test case measures the performance of the `indexOf()` method in JavaScript.
```javascript
return a.indexOf('test4');
```
The purpose of this test is to find the index of the string `'test4'` within the array `a`.

Pros:

* Simple and straightforward to implement.
* Relies on built-in JavaScript functionality.

Cons:

* May not be representative of real-world scenarios, where strings might be searched in a larger dataset.

### 2. `object`

This test case measures the performance of direct property access (e.g., `b['test4']`) instead of using the `indexOf()` method.
```javascript
return b['test4'];
```
The purpose of this test is to find the value associated with the key `'test4'` within the object `b`.

Pros:

* May be faster in certain scenarios, such as when working with large datasets or objects with many properties.

Cons:

* Requires manual knowledge of the property names and data structure.

**Library/Library-less approach**
In this benchmark, both test cases use built-in JavaScript functionality. There is no external library involved.

Special JS feature/syntax
There are no special JavaScript features or syntax used in these test cases.

**Other alternatives**

If you wanted to measure the performance of a different approach, here are some alternatives:

* Using `Array.prototype.indexOf.call()` instead of the standalone `indexOf()` method.
* Using a custom implementation of the `indexOf()` method using binary search or other optimization techniques.
* Comparing the performance of `object` access with other data structures, such as arrays or Maps.

Keep in mind that these alternatives might not be directly comparable to the original test cases and may require significant modifications to the benchmark code.

Related benchmarks:

indexOf versus object 4 (version: 0)

Comparing performance of: indexOf vs object

Created: 2 years ago by: Guest

Jump to the latest result

indexOf

object

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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