Benchmark: Array elements adding string

Tests:

by index
var sArr = new Array(1000); for (i = 1000; i > 0; i--) { sArr[i] = `${i}`; }
by push
var sArr = []; for (i = 1000; i > 0; i--) { sArr.push(`${i}`); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
by index
by push

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 break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The test measures the performance of adding strings to an array using two different approaches: by indexing (using `sArr[i] = `${i}``) and by push (using `sArr.push(`${i}`)`).

**Options Compared**

Two options are compared:

1. **By Indexing**: This approach uses the index of each element in the array (`sArr[i]`) to store the string value. It requires more overhead for indexing and bounds checking.
2. **By Push**: This approach uses the `push` method to add elements to the end of the array. It is generally faster because it avoids the overhead of indexing and bounds checking.

**Pros and Cons**

* **By Indexing**:
	+ Pros: Can be more efficient for small arrays or specific use cases where random access is necessary.
	+ Cons: Requires more memory access and can be slower due to bounds checking and indexing operations.
* **By Push**: 
	+ Pros: Generally faster, as it avoids the overhead of indexing and bounds checking.
	+ Cons: May require more memory allocation and copying for larger arrays.

**Library Usage**

There is no explicit library usage in this benchmark. However, it's worth noting that the `push` method is a built-in JavaScript method that modifies the array in place.

**Special JS Feature or Syntax**

The benchmark uses the template literals feature (`${i}`) to create string values. This syntax was introduced in ECMAScript 2015 (ES6) and allows for more readable and concise string concatenation. The performance difference between this approach and other string concatenation methods (e.g., using `+` or `toString()`) is typically negligible.

**Alternative Approaches**

Other approaches to adding strings to an array could include:

1. Using a loop with the `concat()` method: `for (i = 0; i < 1000; i++) { sArr = sArr.concat(`${i}`); }`
2. Using a string joiner library or utility function.
3. Using a different data structure, such as an array of objects with a string property.

Keep in mind that the performance difference between these approaches may vary depending on the specific use case and implementation details.

Related benchmarks:

Array elements adding string (version: 0)

Comparing performance of: by index vs by push

Created: 3 years ago by: Guest

Jump to the latest result

by index

by push

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):