Benchmark: Array vs Object - MeasureThat.net

Tests:

Array
var list = ['LOREM-IPSUM']; console.log(list[0]);
Object
var list = { LOREM_IPSUM: 'LOREM-IPSUM' } console.log(list.LOREM_IPSUM);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array
Object

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is being tested?**

The provided benchmark compares two ways to access elements in an array vs object: using bracket notation (`[]`) and using dot notation (`.`).

For example, the first test case uses an array with a single element `['LOREM-IPSUM']` and accesses it using bracket notation (`list[0]`). The second test case uses an object with a single property `LOREM_IPSUM: 'LOREM-IPSUM'` and accesses it using dot notation (`list.LOREM_IPSUM`).

**Options being compared**

The two options being compared are:

1. **Bracket notation (array access)**: This method uses the array index to access an element, e.g., `list[0]`.
2. **Dot notation (object property access)**: This method uses the object property name to access a value, e.g., `list.LOREM_IPSUM`.

**Pros and cons of each approach**

**Bracket notation (array access)**

Pros:

* Fast and efficient
* Allows for more flexibility in accessing elements (e.g., using array indices)

Cons:

* May be less readable or maintainable than dot notation
* Can lead to errors if the index is incorrect or out of bounds

**Dot notation (object property access)**

Pros:

* More readable and maintainable than bracket notation
* Easier to understand the intent behind the code

Cons:

* May be slower than bracket notation due to string interpolation
* Limited flexibility in accessing properties (e.g., cannot use array indices)

**Other considerations**

* In modern JavaScript, both approaches are generally considered equivalent in terms of performance. However, some older browsers or environments might still have performance differences between the two.
* The choice between bracket notation and dot notation often comes down to personal preference, coding style, or specific requirements.

**Library usage**

There is no library used in this benchmark.

**Special JS features or syntax**

None mentioned.

Now, let's look at some other alternatives for building JavaScript benchmarks:

1. **Benchmarking libraries**: There are several popular benchmarking libraries available for JavaScript, such as `benchmark.js`, `micro-benchmark`, and `jsperf`. These libraries provide a standardized way to write and compare benchmarks.
2. **WebAssembly (WASM)**: For more compute-intensive workloads, WASM provides a platform-agnostic way to compile high-performance code that can be executed in various environments.
3. **Caching**: Caching techniques, such as memoization or caching libraries like `cache-manager`, can be used to optimize benchmarks by avoiding redundant computations.

These alternatives offer different approaches to building and running JavaScript benchmarks, each with their own strengths and weaknesses.

Latest run results:

Run details: (Test run date: 2025 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36

Browser/OS: Chrome 64 on Windows 7

View result in a separate tab

Test name	Executions per second
Array	22647.1 Ops/sec
Object	20415.3 Ops/sec

Related benchmarks:

Array vs Object (version: 0)

Comparing performance of: Array vs Object

Created: 6 years ago by: Guest

Jump to the latest result

Array

Object

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):