Benchmark: Anonymous Function in Loop

Script Preparation code:

var x = 0;

function doSomething(x) {
  x = 0;
  return x++;
}

Tests:

A
for(var i=0; i < 10; i++) { (function(someValue) { x = 0; return x++; })(i); }
B
for(var i=0; i < 10; i++) { doSomething(i); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
A
B

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Overview of the Benchmark**

The provided benchmark is designed to test the performance of anonymous functions in JavaScript loops, specifically comparing two approaches: creating and executing an anonymous function for each iteration (option A) versus calling a predefined function that increments a variable (option B).

**Options Compared**

There are two options being compared:

A. **Anonymous Function Approach**: This approach creates a new anonymous function for each iteration of the loop. The function takes an input `someValue` and returns the value of the variable `x`, which is initialized to 0, incremented, and then returned.

B. **Predefined Function Approach**: This approach calls a predefined function named `doSomething` that increments a global variable `x` by 1 on each call.

**Pros and Cons of Each Approach**

A. **Anonymous Function Approach**:

Pros:

* Can be useful for creating dynamic functions with changing parameters.
* May be more efficient in terms of memory allocation, as each iteration creates a new function object.

Cons:

* Can result in slower performance due to the overhead of function creation and execution on each iteration.
* May lead to issues with closures and variable scope.

B. **Predefined Function Approach**:

Pros:

* Typically faster and more efficient than creating anonymous functions for each iteration.
* Easier to understand and maintain, as it follows a well-known pattern (incrementing a global variable).

Cons:

* Assumes that the function `doSomething` is already defined and optimized for performance.
* May not be suitable for scenarios where dynamic functions are required.

**Library and Special JS Features**

The benchmark uses no specific libraries beyond standard JavaScript. There are no special JavaScript features or syntax mentioned in the provided code.

**Other Alternatives**

Some alternative approaches to testing this benchmark might include:

1. **Using a different loop iterator**: Instead of using a `for` loop, the benchmark could use a `while` loop or a `for...of` loop.
2. **Adding more complex logic**: Introducing additional operations within the anonymous function or predefined function could make the benchmark more representative of real-world scenarios.
3. **Using different types of variables**: Using variables of different data types (e.g., strings, objects) instead of numbers could add complexity and realism to the benchmark.

However, these alternatives might not be necessary unless specific requirements or edge cases need to be addressed. The current benchmark provides a clear comparison between two straightforward approaches, making it a solid starting point for testing performance characteristics in JavaScript loops.

Related benchmarks:

Anonymous Function in Loop (version: 0)

Comparing performance of: A vs B

Created: 8 years ago by: Guest

Jump to the latest result

A

B

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):