Benchmark: Function vs function() {}

Script Preparation code:

whats faster:
return function () {};
with access to a upper scope variable
or 
return Function('....'); 
with static values

Tests:

function () {}
var z = 1; function x(y) { return z == y; } x(Math.random());
Function()
function x(y) { return 1 == y; } x(Math.random());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
function () {}
Function()

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; rv:97.0) Gecko/20100101 Firefox/97.0

Browser/OS: Firefox 97 on Windows

View result in a separate tab

Test name	Executions per second
Function()	76756440.0 Ops/sec
function () {}	822448512.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents a JavaScript benchmark test case on MeasureThat.net. The goal is to compare the execution speed of two approaches: using an anonymous function (`function () {}`) and creating a new Function object with a string literal.

**Test Case 1: Anonymous Function vs Static Function**

The first test case uses a simple anonymous function, `x(y)`, which returns whether the value of a local variable `z` is equal to `y`. The test creates a random value for `z` and passes it to the function.

Pros of using an anonymous function:

* No need to declare or define the function before use.
* Easier to read and write code.

Cons of using an anonymous function:

* May not be suitable for complex functions that require multiple declarations and definitions.
* Might lead to naming conflicts if used in a large scope.

**Test Case 2: Creating a New Function Object**

The second test case uses the `Function` constructor to create a new function object with a string literal, which returns whether the value of a local variable `z` is equal to `y`.

Pros of creating a new Function object:

* Provides more control over the function's behavior and lifetime.
* Can be used for complex functions that require multiple declarations and definitions.

Cons of creating a new Function object:

* More verbose code compared to anonymous functions.
* May lead to performance overhead due to the creation of a new function object.

**Library Used: None**

In both test cases, no external libraries are used. The tests rely solely on the JavaScript language features.

**Special JS Feature/Syntax: Template Literals (Test Case 1)**

The first test case uses template literals for string interpolation (`"...."`). Template literals provide a concise way to insert expressions into strings at runtime.

Pros of using template literals:

* More readable and expressive code.
* Simplifies string construction.

Cons of using template literals:

* May not be supported in older browsers or environments that don't support ES6+ syntax features.

**Other Alternatives**

For benchmarking JavaScript performance, other alternatives include:

1. **Benchmark.js**: A popular benchmarking library for JavaScript, providing more advanced features like concurrent execution and error handling.
2. **V8 Benchmark**: A benchmarking framework developed by the V8 engine team (Google), allowing developers to write custom benchmarks and compare their results with others.
3. **JSMasstest**: An online testing platform that provides a range of JavaScript performance tests, including DOM manipulation, CSS calculations, and more.

In summary, the provided benchmark test case compares two approaches to creating functions in JavaScript: using an anonymous function versus creating a new Function object. The test highlights the pros and cons of each approach, providing insights for developers choosing between these alternatives.

Related benchmarks:

Function vs function() {} (version: 1)

Comparing performance of: function () {} vs Function()

Created: 2 years ago by: Registered User

Jump to the latest result

function () {}

Function()

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):