Benchmark: Array vs Object - MeasureThat.net

Tests:

Array
var list = []; for (var i = 0; i < 10000; i++) { list[i] = 'Testing...' }
Object
var list = {}; for (var i = 0; i < 10000; i++) { list[i] = 'Testing...' }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array
Object

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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Let's break down the benchmark and its test cases.

**Benchmark Definition**

The benchmark is defined as an object with several properties:

* `Name`: The name of the benchmark, which in this case is "Array vs Object".
* `Description`: An optional description of the benchmark, which is null in this case.
* `Script Preparation Code`: An optional code snippet that should be executed before running the benchmark, which is also null in this case.
* `Html Preparation Code`: Another optional code snippet that should be executed before running the benchmark, which is also null.

This suggests that the benchmark creator wants to provide a clean slate for testing, with no pre-existing code or setup.

**Test Cases**

The benchmark consists of two test cases:

1. **Array**: The first test case has a script definition:
```javascript
var list = [];
for (var i = 0; i < 10000; i++) {
    list[i] = 'Testing...';
}
```
This code creates an empty array and then populates it with 10,000 elements.

2. **Object**: The second test case has a similar script definition:
```javascript
var list = {};
for (var i = 0; i < 10000; i++) {
    list[i] = 'Testing...';
}
```
However, this code creates an empty object instead of an array.

**Options Compared**

The benchmark compares the performance of using an array (`list`) versus an object (`list`) to store and populate a large number of elements (10,000 in this case).

**Pros and Cons of Different Approaches**

Using an **array**:

* Pros:
	+ Arrays are designed for storing collections of values.
	+ They have faster access times compared to objects.
* Cons:
	+ In JavaScript, arrays are 0-indexed, which means the first element is at index 0, not 1.
	+ They require more memory than objects.

Using an **object**:

* Pros:
	+ Objects are designed for storing key-value pairs and have faster access times compared to arrays.
	+ They can be used as a substitute for arrays in some situations.
* Cons:
	+ Objects are generally slower than arrays due to the overhead of using a hash table.
	+ In JavaScript, objects do not support indexing like arrays.

**Library Usage**

In this benchmark, no libraries are explicitly mentioned. However, it's worth noting that the use of `for` loops and array/object literals is a fundamental part of JavaScript, so no library-specific code is needed.

**Special JS Features or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark. The focus is solely on comparing the performance of using arrays versus objects to store and populate a large number of elements.

**Other Alternatives**

To measure the performance of using arrays versus objects, you could also consider the following alternatives:

* Using `Set` data structure (a built-in JavaScript object) instead of an array.
* Using a library like Lodash or Ramda, which provide optimized array and object methods for iteration and manipulation.
* Using a different programming language that has built-in support for arrays and objects.

However, since the benchmark is focused on comparing the performance of using arrays versus objects in JavaScript, these alternatives would need to be modified to accommodate the specific requirements of the benchmark.

Related benchmarks:

Array vs Object (version: 0)

Comparing performance of: Array vs Object

Created: 8 years ago by: Guest

Jump to the latest result

Array

Object

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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