Benchmark: test-foreach - MeasureThat.net

Tests:

foreach only
const applicationKeys = [ { key: 1}, {key: 3}, {key: 4} ]; const p = applicationKeys[0].key;
stream
const applicationKeys = [ { key: 1}, {key: 3}, {key: 4} ]; const p = applicationKeys[0]['key'];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
foreach only
stream

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Measuring the performance of different approaches to accessing properties in JavaScript arrays can be a fascinating topic.

The provided JSON represents two individual test cases, each with its own benchmark definition. The purpose of these tests is to measure the performance difference between accessing array elements using bracket notation (`[index]` or `[property name]`) and dot notation (`.`).

**Options Compared:**

1. **Bracket Notation (`[]`)**:
	* Syntax: `array[index]`
	* Pros:
		+ More secure, as it prevents unexpected variable assignments.
		+ Easier to maintain, as it clearly separates data from access logic.
	* Cons:
		+ May be slower due to the overhead of array indexing.
2. **Dot Notation (`.`)**:
	* Syntax: `array.propertyName`
	* Pros:
		+ Often faster than bracket notation, especially for nested objects.
		+ Can be more concise and readable in some cases.
3. **Bracket Notation with dot notation (**`[]` + `property name`**)**:
	* Example: `array[0].propertyName`
	* Pros:
		+ Combines the benefits of both bracket and dot notation.
4. **Accessing properties using object keys (using the `[key]` syntax)**:
	* Example: `{ key: value }[key]`
	* Pros:
		+ More concise and readable than traditional bracket notation.

**Pros, Cons, and Other Considerations:**

* Bracket notation is generally safer, but it can be slower.
* Dot notation is often faster, especially for nested objects. However, it may lead to unexpected variable assignments if not used carefully.
* Using dot notation with array indices (`array[0].propertyName`) can be a good compromise between the two approaches.
* Accessing properties using object keys ( `{ key: value }[key] `) is a more concise and readable way to access nested objects. However, it may require additional setup or configuration.

**Library Usage:**

The provided benchmark does not explicitly use any libraries. However, if you were to extend this benchmark to include library usage, some examples of libraries that could be used for performance testing include:

* `lodash` (e.g., `_.get()`, `_.at()`): Provides a more concise and readable way to access nested objects.
* `Array.prototype.forEach()` or `Array.prototype.map()`: Can be used in conjunction with bracket notation to create more complex test scenarios.

**Special JS Features/Syntax:**

There are no special JavaScript features or syntax mentioned in the provided benchmark. However, if you were to extend this benchmark to include new features, some examples of features that could be considered include:

* `let` and `const` declarations for variable scope management.
* Function expressions and arrow functions for concise code snippets.
* Object destructuring and spread syntax (`{ ... }`, `[...array]`) for more expressive object manipulation.

**Other Alternatives:**

If you were to create an alternative benchmark with different test cases, some examples of other approaches you could consider include:

* Accessing properties using `in` operator or bracket notation with the `hasOwnProperty()` method.
* Using a custom function to access array elements (e.g., `array.get(index)`).
* Creating a more complex data structure (e.g., an object array) and accessing its properties in different ways.

Keep in mind that these alternative approaches may not directly compare to the original bracket notation vs. dot notation scenario, but they could provide additional insights into other aspects of JavaScript performance optimization.

Related benchmarks:

test-foreach (version: 0)

Comparing performance of: foreach only vs stream

Created: 4 years ago by: Guest

Jump to the latest result

foreach only

stream

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):