Benchmark: new Function vs func

Script Preparation code:

var func = new Function('a', 'b',' return a + b');
var func2 = ( a, b ) => a+b;

Tests:

new
func(1,2)
code
func2(1,2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new
code

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what's being tested.

**Benchmark Definition:**

The benchmark is comparing two approaches:

1. **`new Function()`**: This creates a new function at runtime using the `Function` constructor, which takes a string of arguments as its first parameter.
2. **Anonymous arrow function `( ) => expression`**: This creates an anonymous function that takes variables as input and returns a value.

In this specific benchmark, the comparison is between the `new Function()` approach and the anonymous arrow function approach for executing a simple arithmetic expression: `func(a, b) = a + b`.

**Pros and Cons:**

1. **`new Function()`**:
	* Pros:
		+ More explicit and readable syntax.
		+ Can be used to create functions with named parameters.
	* Cons:
		+ Creates a new function object at runtime, which can lead to overhead due to memory allocation and garbage collection.
		+ Less efficient than anonymous arrow functions for simple expressions like this one.
2. **Anonymous Arrow Function `( ) => expression`**:
	* Pros:
		+ More concise and expressive syntax.
		+ Optimized by modern JavaScript engines for function calls with a single expression return type.
	* Cons:
		+ Less readable or maintainable for complex functions or when debugging is required.
		+ Limited to single-expression return types.

**Library:**

There is no explicit library mentioned in the benchmark definition, but it's worth noting that `Function` and arrow functions are built-in JavaScript features. The use of `new Function()` might be more common in older JavaScript code or when working with specific libraries or frameworks that rely on this syntax.

**Special JS Feature/Syntax:**

There is no special JavaScript feature or syntax mentioned in the benchmark definition, but it's worth noting that arrow functions were introduced in ECMAScript 2015 (ES6) and have since become a standard part of modern JavaScript.

**Benchmark Preparation Code:**

The provided code snippet creates two functions:

1. `func` using `new Function()`, which takes a string of arguments (`'a', 'b'`) and returns the sum of `a` and `b`.
2. `func2` using an anonymous arrow function, which also takes variables `a` and `b` as input and returns their sum.

The benchmark comparison is between these two functions, with each test case executing a different function call with the same arguments (`1`, `2`) to measure their performance differences.

**Other Alternatives:**

For measuring function execution speed, alternatives might include:

* Using a library like Benchmark.js or micro-benchmarking frameworks.
* Writing custom benchmarking code using Web APIs (e.g., `performance.now()`, `requestAnimationFrame()`) or third-party libraries.
* Utilizing cloud-based services like JSPerf or JSBench for large-scale benchmarking.

Related benchmarks:

new Function vs func (version: 0)

Comparing performance of: new vs code

Created: 4 years ago by: Registered User

Jump to the latest result

new

code

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):