Benchmark: Switch vs Object Literal by surbina v2

Script Preparation code:

var str = 'abc';
str = str.charAt(Math.floor(Math.random() * 3));

Tests:

Switch
function A() { console.log('A'); } function B() { console.log('B'); } function C() { console.log('C'); } switch (str) { case 'a': A(); break; case 'b': B(); break; case 'c': C(); break; }
Object Literal
function A() { console.log('A'); } function B() { console.log('B'); } function C() { console.log('C'); } var objLiteral = { a: A, b: B, c: C } objLiteral[str]();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Switch
Object Literal

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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Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark, titled "Switch vs Object Literal" by surbina v2, compares the performance of two approaches: `switch` statements and object literals (i.e., property access with an object) to invoke functions. The goal is to determine which approach is faster.

**Script Preparation Code**

The script preparation code, `var str = 'abc';\r\nstr = str.charAt(Math.floor(Math.random() * 3));`, generates a random string `str` that will be used as the key in both tests. This ensures that the benchmark results are not influenced by any specific string values.

**Test Cases**

There are two test cases:

1. **Switch**: In this test, a `switch` statement is used to invoke functions based on the value of `str`. The `switch` statement checks the value of `str` and executes the corresponding function (either `A()`, `B()`, or `C()`).
2. **Object Literal**: In this test, an object literal is used to invoke functions based on the value of `str`. The object literal `{a: A, b: B, c: C}` has properties that correspond to the three functions. When the property corresponding to `str` is accessed, the function associated with that property is executed.

**Library**

There is no explicit library mentioned in the benchmark definition or test cases. However, the use of `charAt()` and `Math.random()` suggests that JavaScript's built-in functionality is being used.

**Special JS Feature/Syntax**

There are no special JS features or syntaxes explicitly mentioned in the benchmark definition or test cases.

**Pros and Cons of Each Approach**

Here's a brief analysis of the pros and cons of each approach:

* **Switch**: Pros:
	+ Can be faster for simple cases where the value is known at compile-time.
	+ Less memory overhead compared to object literals.
* Cons:
	+ Can lead to slower performance in complex cases or when using unknown values.
	+ Less flexible than object literals, as it requires explicit case handling.
* **Object Literal**: Pros:
	+ More flexible and dynamic than `switch` statements, as it can handle unknown values.
	+ Easier to maintain and update code, especially for large datasets.
* Cons:
	+ Typically slower performance compared to `switch` statements due to the overhead of property access.

**Other Considerations**

When deciding between these two approaches, consider the following factors:

* **Known vs. Unknown Values**: If you know the value at compile-time or have a small number of known values, `switch` might be faster. For unknown values or large datasets, object literals might be more suitable.
* **Code Maintainability and Flexibility**: Object literals are often preferred for their flexibility and ease of maintenance.

**Alternative Approaches**

Other alternatives to consider:

* **Array-based approach**: Instead of using a single property access, you can use an array with multiple elements. When the value is known, access the corresponding element in the array.
* **Function tables or maps**: Similar to object literals, but using a data structure like a function table or map, which provides a more explicit and efficient way to store functions.

Keep in mind that these alternatives might not provide a significant performance improvement over the current `switch` vs. object literal comparison.

Related benchmarks:

Switch vs Object Literal by surbina v2 (version: 0)

Comparing performance of: Switch vs Object Literal

Created: 6 years ago by: Guest

Jump to the latest result

Switch

Object Literal

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):