Benchmark: oject vs array - MeasureThat.net

Script Preparation code:

var o = {x: 1, y: 2, z: 3};
var a = [1,2,3];

Tests:

object
for (var i=0; i<1000;i++){ var t = o.x * o.y * o.z; }
array
for (var i=0; i<1000;i++){ var t = a[0] * a[1] * a[2]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object
array

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36

Browser/OS: Chrome 88 on Windows

View result in a separate tab

Test name	Executions per second
object	1792.2 Ops/sec
array	1777.8 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark and its options.

**Benchmark Overview**

The benchmark, named "object vs array", is designed to compare the performance of two data structures: objects and arrays. The script preparation code initializes an object `o` with three properties (`x`, `y`, and `z`) and an array `a` with three elements (1, 2, and 3). The benchmark then runs a loop that performs a calculation on these data structures.

**Options Compared**

The two options being compared are:

1. **Object-based calculation**: In the "object" test case, the calculation is performed using the object's properties (`o.x * o.y * o.z`).
2. **Array-based calculation**: In the "array" test case, the calculation is performed using the array elements (`a[0] * a[1] * a[2>`).

**Pros and Cons**

Here are some pros and cons of each approach:

* **Object-based calculation**:
	+ Pros: May be more readable and maintainable for developers familiar with objects.
	+ Cons: Can lead to slower performance due to the overhead of accessing object properties through dot notation (e.g., `o.x`) compared to accessing array elements by index (e.g., `a[0]`).
* **Array-based calculation**:
	+ Pros: Typically faster and more efficient, as it avoids the overhead of accessing object properties.
	+ Cons: May be less readable for developers unfamiliar with arrays.

**Library and Special JS Features**

There are no libraries or special JavaScript features used in this benchmark. The script only uses basic JavaScript syntax and data structures.

**Other Considerations**

* **Memory allocation**: Both options allocate memory on the heap, but the object-based approach may lead to more memory fragmentation due to the creation of multiple objects with different sizes.
* **Cache locality**: The array-based calculation may exhibit better cache locality, as the elements are stored contiguously in memory.

**Alternative Benchmarks**

Other benchmarks that compare performance of data structures like objects and arrays might include:

* A benchmark that compares the performance of object-based vs. array-based lookups
* A benchmark that tests the performance of different data structure implementations (e.g., a custom object vs. a built-in JavaScript object)
* A benchmark that evaluates the performance of data-driven programming using arrays or objects

Keep in mind that the choice of benchmark options depends on the specific use case and requirements.

Related benchmarks:

oject vs array (version: 0)

Comparing performance of: object vs array

Created: 3 years ago by: Guest

Jump to the latest result

object

array

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):