Benchmark: test array and set 2

Tests:

empty array
const a = new Array(1e4).fill(0) const d = new Int8Array(1e4) const c = [] const e = new Set() let b for (let i = 0; i < 1e4; i++) c[i] = i for (let i = 0; i < 1e4; i++) b = c[i]
array 10000
const a = new Array(1e4).fill(0) const d = new Int8Array(1e4) const c = [] const e = new Set() let b for (let i = 0; i < 1e4; i++) a[i] = i for (let i = 0; i < 1e4; i++) b = a[i]
Int8Array
const a = new Array(1e4).fill(0) const d = new Int8Array(1e4) const c = [] const e = new Set() let b for (let i = 0; i < 1e4; i++) d[i] = i for (let i = 0; i < 1e4; i++) b = d[i]
Set
const a = new Array(1e4).fill(0) const d = new Int8Array(1e4) const c = [] const e = new Set() let b for (let i = 0; i < 1e4; i++) e.add(i) for (let i = 0; i < 1e4; i++) b = e.has(i)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
empty array
array 10000
Int8Array
Set

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
empty array	26347.8 Ops/sec
array 10000	50701.7 Ops/sec
Int8Array	47329.4 Ops/sec
Set	3422.7 Ops/sec

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is crucial for optimizing applications and ensuring a seamless user experience.

**Overview**

The provided JSON represents a benchmark suite with four test cases, each testing different approaches to array creation and iteration in JavaScript. The tests aim to compare the performance of various data structures: arrays (empty, filled with zeros), `Int8Array`, and sets.

**Test Cases**

1. **Empty Array**: This test creates an empty array using `const c = []` and then iterates over it using a `for` loop.
2. **Filled Array (10000 elements)**: Similar to the previous test, but this time creates an array filled with zeros using `new Array(1e4).fill(0)` and then iterates over it.
3. **Int8Array**: Creates an `Int8Array` instance with 10000 elements using `new Int8Array(1e4)`, populates it with values, and then iterates over it using a `for` loop.
4. **Set**: Creates a set using `const e = new Set()` and adds 10000 elements to it. Then, iterates over the set using the `has()` method.

**Options Compared**

The tests compare the following options:

* Empty array vs filled array (empty)
* Array creation using `new Array()`.fill(0)` vs creating an `Int8Array` instance
* Set iteration using `has()` vs other approaches

**Pros and Cons of Each Approach**

1. **Empty Array**: Pros: lightweight, easy to create; Cons: slower than other approaches due to the need for iteration.
2. **Filled Array (10000 elements)**: Pros: faster than empty array iterations; Cons: requires creating a large array.
3. **Int8Array**: Pros: uses a specialized buffer for efficient storage and iteration; Cons: may have performance overhead due to the use of an external buffer.
4. **Set**: Pros: provides fast lookup and iteration using `has()`; Cons: may incur additional memory allocation and iteration overhead.

**Library and Purpose**

The tests utilize the following libraries:

* None (native JavaScript features)

**Special JS Features or Syntax**

None mentioned in the provided benchmark definition, but it's worth noting that other test cases might use more advanced features like async iterators or Web Workers for parallelization.

**Other Alternatives**

For measuring JavaScript performance, consider exploring the following alternatives:

* V8 Benchmark Suite ( native JavaScript, Node.js)
* jsperf (native JavaScript, browser-based)
* Benchmark.js (Native and Browser-based)

Note that these alternatives might have different features, focus areas, or usage models compared to MeasureThat.net.

I hope this explanation helps you understand the provided benchmark definition and test cases!

Related benchmarks:

test array and set 2 (version: 0)

Comparing performance of: empty array vs array 10000 vs Int8Array vs Set

Created: 2 years ago by: Guest

Jump to the latest result

empty array

array 10000

Int8Array

Set

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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