Benchmark: Callback vs Class method

Tests:

Callback
function someFunction(a) { for (let i = 0; i < 10000; i++) { a({}); } } const someFunction2 = (t) => typeof t === 'object'; someFunction(someFunction2);
Class Method
class A { method(t) { return typeof t === 'object' } } function someFunction(a) { for (let i = 0; i < 10000; i++) { a.method({}); } } someFunction(new A);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Callback
Class Method

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/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Windows

View result in a separate tab

Test name	Executions per second
Callback	398451.4 Ops/sec
Class Method	18605.3 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):

LLMs can make mistakes. Check important info.

The benchmark titled "Callback vs Class Method" evaluates the performance of two different JavaScript approaches for executing a function that checks the type of an argument. Specifically, it compares the use of a standalone callback function to a method defined within a class.

### Test Cases Overview

1. **Callback**: 
   - **Benchmark Definition**:
     ```javascript
     function someFunction(a) {
         for (let i = 0; i < 10000; i++) {
             a({});
         }
     }
     
     const someFunction2 = (t) => typeof t === 'object';
     
     someFunction(someFunction2);
     ```
   - **Description**: This test defines a function `someFunction` that accepts a callback `a` and executes it 10,000 times with an empty object as an argument. The callback `someFunction2` checks whether the argument is an object.
   - **Performance Result**: 398,451.41 executions per second.

2. **Class Method**:
   - **Benchmark Definition**:
     ```javascript
     class A {
         method(t) { return typeof t === 'object'; }
     }
     
     function someFunction(a) {
         for (let i = 0; i < 10000; i++) {
             a.method({});
         }
     }
     
     someFunction(new A);
     ```
   - **Description**: Here, a class `A` is defined with a method `method` that performs the same type check. The function `someFunction` is invoked with an instance of class `A`, executing the method 10,000 times.
   - **Performance Result**: 18,605.35 executions per second.

### Comparative Analysis

**Callback Function Approach**:
- **Pros**:
  - Simpler and more straightforward to understand.
  - Directly passes a function, which can lead to more flexible designs.
  - Generally exhibits higher performance in this benchmark scenario.
  
- **Cons**:
  - Can lead to callback hell or complexity in managing numerous callbacks, especially in larger applications.

**Class Method Approach**:
- **Pros**:
  - Encapsulates behavior within a class, promoting object-oriented design.
  - Makes it easier to manage state and related data, enabling code reuse.

- **Cons**:
  - Introduces some overhead due to class instantiation and method access, resulting in lower performance in this benchmark.
  - Can be more complex for simple tasks where a functional approach would suffice.

### Other Considerations
- JavaScript’s performance in handling functions and classes can vary across different engines and versions, as illustrated in the results from Chrome 136.
- The test execution is confined to 10,000 iterations, which might not account for differences in performance under varied loads or real-world scenarios.

### Alternatives
There are various alternatives to these approaches depending on the use case:
- **Direct Function Calls**: Instead of a callback or class, simply calling a function directly can sometimes yield clarity and performance, although it may lack the flexibility.
- **Higher-Order Functions**: Utilizing functions that return other functions could provide a middle ground between flexibility and performance, depending on how well they are optimized in the engine.
- **Functional Programming Approaches**: Using libraries like Lodash can streamline checks and manipulations, although at the cost of additional overhead and dependency management.

In summary, the benchmark illustrates the performance differences between using callbacks and class methods for executing functions in JavaScript. Understanding these differences helps engineers choose appropriate strategies based on their specific use cases, balancing performance and code structure.

Related benchmarks:

Callback vs Class method (version: 1)

Comparing performance of: Callback vs Class Method

Created: one year ago by: Guest

Jump to the latest result

Callback

Class Method

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):