Benchmark: New vs literal - MeasureThat.net

Tests:

Const function
let selectChart = function(x, y, z) { return { x, y, z }; }; for (let ii = 0; ii < 10000; ii++) { let asdf = selectChart(ii, 'asdf' + ii, ii - 10); }
Object construction
class Foo { constructor(x, y, z) { this.x = x; this.y = y; this.z = z; } } for (let ii = 0; ii < 10000; ii++) { let asdf = new Foo(ii, 'asdf' + ii, ii - 10); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Const function
Object construction

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Windows

View result in a separate tab

Test name	Executions per second
Const function	42097.0 Ops/sec
Object construction	1782.8 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark and its results.

**What is being tested?**

The provided JSON represents two individual test cases for JavaScript microbenchmarks on MeasureThat.net. The first test case, "Const function," tests the performance of declaring a constant function in JavaScript. In this case, the `selectChart` function is declared with the `let` keyword and returns an object with three properties.

The second test case, "Object construction," tests the performance of constructing objects using the `class` keyword and the `new` keyword. In this case, the `Foo` class has a constructor that assigns values to its properties (`x`, `y`, and `z`).

**Options compared**

In both test cases, two approaches are being compared:

1. **Literal object declaration**: In the "Const function" test case, the `selectChart` function is declared with the `let` keyword, which creates a new scope for the function's variables.
2. **Non-literal object declaration**: In the "Object construction" test case, the `Foo` class uses the `class` keyword to define its constructor.

**Pros and cons of each approach**

1. **Literal object declaration (Const function)**:
	* Pros: Can improve performance by reducing the overhead of creating a new scope.
	* Cons: May not be suitable for all use cases where the function needs to be reusable or has side effects.
2. **Non-literal object declaration (Object construction)**:
	* Pros: Suitable for reuse and can provide better encapsulation, making code more modular.
	* Cons: Can introduce additional overhead due to the creation of a new class instance.

**Library usage**

In both test cases, there is no explicit library usage mentioned. However, it's worth noting that MeasureThat.net might use some internal libraries or frameworks for benchmarking and rendering the results.

**Special JavaScript features or syntax**

There are no special JavaScript features or syntax used in these test cases, such as `async/await`, ` Promises`, or modern JavaScript features like arrow functions or destructuring.

**Other alternatives**

If you're interested in exploring other approaches, here are a few alternatives:

1. **Arrow function**: Instead of using the `let` keyword for function declaration, you can use an arrow function to create a concise and lightweight function.
2. **Closure**: You can create a closure by declaring a function inside another function, which can help reduce scope creation overhead.
3. **Function expression**: Instead of using the `let` keyword, you can declare a function as an expression using the `()` syntax.

For example:

```javascript
// Arrow function
const selectChart = (x, y, z) => ({ x, y, z });

// Closure
function outer() {
  const inner = (x, y, z) => ({ x, y, z });
  return inner;
}

// Function expression
const selectChartExpression = function(x, y, z) { return { x, y, z }; };
```

Keep in mind that these alternatives may have different performance characteristics and use cases.

Related benchmarks:

New vs literal (version: 0)

Comparing performance of: Const function vs Object construction

Created: 8 years ago by: Guest

Jump to the latest result

Const function

Object construction

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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