Benchmark: empty array diff

Script Preparation code:

let arr = [{a: "a"}, {b: "b"}, {c: "c"}, {d: "d"}, {e: "e"}, {f: "f"}, {g: "g"}, {h: "h"}, {i: "i"}, {j: "j"}];

Tests:

empty
arr = [];
length
arr.length = 0
splice
arr.splice(0, arr.length)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
empty
length
splice

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):

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is a crucial task, especially when it comes to microbenchmarks like MeasureThat.net.

**Benchmark Definition**

The provided JSON defines three benchmark tests:

1. `empty array diff`: This test compares the difference in execution time between creating an empty array and creating an array with 10 elements using the spread operator (`let arr = [...];`).
2. `length`: This test measures the execution time of accessing the length property of an array.
3. `splice`: This test measures the execution time of removing elements from an array using the `splice()` method.

**Options Compared**

Each benchmark compares two different approaches:

1. **Empty Array Creation**: Creating an empty array (`let arr = []`) vs. creating an array with 10 elements using the spread operator (`let arr = [...];`).
2. **Length Access**: Accessing the length property of an array (`arr.length`) vs. accessing it directly (`arr`)
3. **Splice Removal**: Removing all elements from an array using `splice(0, arr.length)` vs. removing them in a single operation (no implementation is provided).

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Empty Array Creation**
	* Pros: Simple, fast, and efficient.
	* Cons: May not be suitable for large arrays or when data needs to be pre-populated.
2. **Length Access**
	* Pros: Fast and efficient, as accessing a property is typically a lightweight operation.
	* Cons: May have some overhead due to the language's property lookup mechanism.
3. **Splice Removal** (no implementation provided)
	* Pros: Not applicable.
	* Cons: The implementation is missing.

**Library and Special JS Features**

None of the benchmark tests use any external libraries or special JavaScript features like async/await, promises, or ES modules.

**Other Alternatives**

If you were to create similar benchmarks for other scenarios, some potential alternatives include:

1. Creating an array from a string (e.g., `let arr = new Array(str.length).fill(0);`)
2. Modifying an existing array using push() vs. splice()
3. Using array methods like filter(), map(), or reduce()

Keep in mind that these alternatives would require modifying the benchmark tests to accommodate the new scenarios.

I hope this explanation helps software engineers understand the context and implications of these benchmarks!

Related benchmarks:

empty array diff (version: 0)

Comparing performance of: empty vs length vs splice

Created: 4 years ago by: Guest

Jump to the latest result

empty

length

splice

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):