Benchmark: Object key access vs array find_2_

Script Preparation code:

var items = Array.from(Array(10), (_,x) => ({key: x, value: x*10}));

var objContainer = {};
var arrContainer = [];

for (let i = 10000; i >= 0; i--) {
  const index = Math.floor(Math.random() * 10);
  const item = items[index];
  objContainer[item.key] = item;
  arrContainer.push(item)
}

Tests:

Object access
items.forEach(item => objContainer[item.value])
Array find
items.forEach(item => arrContainer.find(containerItem => containerItem.value === item.value))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object access
Array find

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the benchmarking test case.

**What is being tested?**

The provided JSON represents two individual test cases that compare the performance of object access by key versus array find to find an object. The tests are designed to measure the speed of these operations on a dataset containing 10,000 objects, where each object has a unique `key` and a corresponding `value`.

**Options being compared:**

There are two options being compared:

1. **Object Access**: This option uses the `forEach` method with an arrow function to iterate over the `items` array and access objects in the `objContainer` object using their keys.
2. **Array Find**: This option uses the `find` method to search for an object in the `arrContainer` array that matches a specific condition based on its value.

**Pros and Cons of each approach:**

* **Object Access**:
	+ Pros:
		- Can be more efficient if the key is unique and not expected to change frequently.
		- Can take advantage of caching or other optimizations in JavaScript engines.
	+ Cons:
		- May require more memory allocation and garbage collection, which can impact performance.
		- Can lead to slower iteration if the keys are not unique or if there are many collisions.
* **Array Find**:
	+ Pros:
		- Can be more efficient if the value is unique or expected to change frequently.
		- Can avoid memory allocation and garbage collection for each object in the array.
	+ Cons:
		- May require more computational resources to search through the entire array.
		- Can lead to slower performance if the array is large or the condition is complex.

**Library:**

The `Array.from()` method is used to create a new array from an iterable, and the `forEach` and `find` methods are part of the ECMAScript standard. No external library is required for these operations.

**Special JavaScript feature/syntax:**

There are no special JavaScript features or syntax used in this benchmarking test case.

**Other alternatives:**

If you want to explore alternative approaches, here are a few options:

1. **Using `for...of` loop**: Instead of using `forEach`, you could use a `for...of` loop to iterate over the array and access objects.
2. **Using `Array.prototype.findIndex()`**: This method returns the index of the first element in the array that satisfies the provided condition, similar to `find`.
3. **Using a custom search function**: You could implement your own search function using a binary search algorithm or other optimization techniques.

Keep in mind that these alternatives may not provide significant performance improvements and should be evaluated on a case-by-case basis.

Related benchmarks:

Object key access vs array find_2_ (version: 0)

Test speed of object access by key vs array find to find object

Comparing performance of: Object access vs Array find

Created: 2 years ago by: Guest

Jump to the latest result

Object access

Array find

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):