Benchmark: test2agshd - MeasureThat.net

Tests:

test1
const array = new Array(10 ** 7); array.length=0;
test3
const array = new Array(10 ** 7); array.splice(0)
test2
const array = new Array(10 ** 7); while (array.length) array.pop();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test1
test3
test2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser/OS: Chrome 110 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
test1	38.3 Ops/sec
test3	14.7 Ops/sec
test2	20.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this JavaScript microbenchmark.

**What is being tested?**

The provided benchmark tests the performance of three different approaches for clearing an array:

1. `array.length = 0;`
2. `array.splice(0)`
3. `while (array.length) array.pop();`

These approaches are being compared to measure their execution speed and identify any potential differences in performance.

**Options compared**

The options being compared are:

* **`array.length = 0;`**: This approach sets the length of the array to 0, effectively clearing it.
* **`array.splice(0)`**: This approach uses the `splice()` method with an index of 0 to remove the first element from the array, effectively clearing it.
* **`while (array.length) array.pop();`**: This approach uses a while loop and the `pop()` method to repeatedly remove elements from the end of the array until it's empty.

**Pros and cons**

Here are some pros and cons for each approach:

* **`array.length = 0;`**:
	+ Pros: Simple, efficient, and widely supported.
	+ Cons: Can be slower than other methods in some browsers due to its nature as a "magic" operation.
* **`array.splice(0)`**:
	+ Pros: Works well for arrays of any length and is often faster than `length = 0`.
	+ Cons: Requires an additional function call, which can add overhead.
* **`while (array.length) array.pop();`**:
	+ Pros: Can be more flexible and suitable for specific use cases where other methods are not practical.
	+ Cons: Slower than the first two approaches due to the loop and method calls.

**Other considerations**

It's worth noting that these tests might also highlight differences in browser behavior or optimization strategies. Some browsers might prioritize certain operations over others, leading to variations in performance across different implementations.

**Library usage**

There is no explicit library used in this benchmark. However, if you're interested in exploring libraries for similar benchmarks, some popular options include:

* `Benchmark.js`: A JavaScript library designed specifically for creating microbenchmarks.
* `Testcafe`: An open-source testing framework that includes tools for performance testing.

**Special JS features or syntax**

There are no special JavaScript features or syntax used in this benchmark. The tests only rely on standard JavaScript language constructs and operations.

Overall, these benchmarks aim to provide a general understanding of the relative performance characteristics of different approaches for clearing an array in JavaScript.

Related benchmarks:

test2agshd (version: 0)

test

Comparing performance of: test1 vs test3 vs test2

Created: one year ago by: Guest

Jump to the latest result

test1

test3

test2

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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