Benchmark: JS multiple function arguments vs. single arguments object (without var) 2

Script Preparation code:

const data = { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6 };

function f1(a, b, c, d, e, f, g) {
  return a + b + c + d + e + f + g;
}

function f2(p) {
  return p.a + p.b + p.c + p.d + p.e + p.f + p.g;
}

Tests:

Multiple arguments
f1(data.a, data.b, data.c, data.d, data.e, data.f, Math.random())
args object
f2({ a: data.a, b: data.b, c: data.c, d: data.d, e: data.e, f: data.f, g: Math.random() })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Multiple arguments
args object

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Multiple arguments	96173040.0 Ops/sec
args object	95606176.0 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 11 months ago):

LLMs can make mistakes. Check important info.

The benchmark outlined in the provided JSON tests the performance differences between two different methods of passing arguments to JavaScript functions: using multiple individual arguments and using a single arguments object.

### Benchmark Functions

1. **Function f1 (Multiple Arguments)**:
   - This function takes multiple arguments directly: `a`, `b`, `c`, `d`, `e`, `f`, and an additional argument `g`. 
   - It returns the sum of these arguments.

2. **Function f2 (Arguments Object)**:
   - This function takes a single parameter `p`, which is expected to be an object. Inside the function, it accesses the properties of this object (`p.a`, `p.b`, etc.) to return their sum.
   - The benchmark case creates an object with properties that correspond to the function parameters before passing it to `f2`.

### Test Cases

- **Test Case 1**: `f1(data.a, data.b, data.c, data.d, data.e, data.f, Math.random())`
  - This case measures the execution speed of `f1` with explicit parameters.
  
- **Test Case 2**: `f2({ a: data.a, b: data.b, c: data.c, d: data.d, e: data.e, f: data.f, g: Math.random() })`
  - This case measures the execution speed of `f2`, which sums the properties of the passed object.

### Performance Results

The benchmark results show that `f1` (multiple arguments) executed at approximately **96,173,040** executions per second, while `f2` (arguments object) executed at about **95,606,176** executions per second. This indicates that `f1`, the method with individual arguments, is marginally faster than passing an object but both approaches demonstrated high performance.

### Pros and Cons

#### Multiple Arguments (`f1`):
- **Pros**:
  - Directly defining parameters may lead to better optimization by the JavaScript engine.
  - Easier to understand and use for straightforward cases where the number of parameters is fixed.
- **Cons**:
  - Inflexibility when it comes to changing the number of arguments. Adding more parameters requires changing the function signature.

#### Arguments Object (`f2`):
- **Pros**:
  - More flexible since the function can accept a varying number of arguments without changing the signature. 
  - Easier to manage when dealing with numerous optional parameters.
- **Cons**:
  - Potentially slower as it requires property lookups on the object, which can incur overhead.
  - Slightly more complex syntax, which might impact readability in simple cases.

### Considerations for Choosing Between Approaches

1. **Function Signature Complexity**: Use multiple arguments for simpler cases and an arguments object for complex or optional parameters.
   
2. **Performance Needs**: If execution speed is paramount, and the function's structure allows it, favor using multiple arguments.

3. **Code Maintainability**: In larger applications, structuring functions with objects can enhance maintainability, especially if the function is expected to evolve over time.

### Alternatives

Other alternatives for function argument passing in JavaScript include:
- **Rest Parameters**: Syntax like `function f(...args)` allows for a variable number of arguments to be passed as an array. This combines flexibility with a cleaner syntax.
- **Destructuring**: You can destructure parameters directly from objects, improving readability and maintainability while still taking advantage of an object’s flexibility.

The performance trade-offs between these methods can vary with different use cases, and developers should choose based on the specific context and requirements of their applications.

Related benchmarks:

JS multiple function arguments vs. single arguments object (without var) 2 (version: 1)

Comparing performance of: Multiple arguments vs args object

Created: 11 months ago by: Guest

Jump to the latest result

Multiple arguments

args object

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 11 months ago):