Benchmark: Switch vs Object Literal v2

Script Preparation code:

var str = 'abc';
str = str.charAt(Math.floor(Math.random() * 3));

function a() {
	console.log('A');
}

function b() {
	console.log('B');
}

function c() {
	console.log('C');
}

Tests:

Switch
switch (str) { case 'a': a(); break; case 'b': b(); break; case 'c': b(); break; }
Object Literal
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:

No previous run results

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

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Let's dive into the benchmarking results.

**What is being tested?**

The benchmark tests two different approaches to conditionally execute functions based on a variable `str` that can take one of three values: 'a', 'b', or 'c'.

**Test Case 1: Switch Statement (Switch)**

In this test case, the variable `str` is used as a switch expression with cases for each possible value. When the match is found, the corresponding function (`a()`, `b()`, or `c()`) is called.

**Pros and Cons of Switch Statements**

* Pros:
	+ Concise code
	+ Easy to read when there are few cases
	+ Efficient in terms of execution speed (since it uses a jump table under the hood)
* Cons:
	+ Can become cluttered with many cases
	+ Not suitable for dynamic case addition or removal

**Test Case 2: Object Literal (Object Literal)**

In this test case, an object `objLiteral` is created with properties that reference the functions `a()`, `b()`, and `c()`. Then, the function corresponding to the value of `str` is called by accessing the object property.

**Pros and Cons of Object Literals**

* Pros:
	+ Can be more dynamic than switch statements (new cases can be added without modifying existing code)
	+ Readable when used with meaningful property names
	+ Suitable for complex logic or conditional execution
* Cons:
	+ May incur a slight performance overhead due to object lookup

**The Benchmark Results**

The results show that the **Switch Statement** approach executes approximately 11,610 more iterations per second than the **Object Literal** approach on Chrome Mobile 100.

**Considerations and Alternatives**

Keep in mind:

* The actual performance difference might be negligible for most use cases.
* Both approaches have their own strengths and weaknesses; choose the one that best fits your needs.
* If you need to add or remove cases dynamically, consider using an object literal with a custom mechanism for adding/removing properties.

Other alternatives to these approaches include:

* Using a `if-else` statement (less concise but more readable than switch statements)
* Implementing a custom solution based on the specific requirements of your use case
* Utilizing third-party libraries or frameworks that provide specialized conditional execution mechanisms

No special JavaScript features or syntax are used in this benchmark.

Related benchmarks:

Switch vs Object Literal v2 (version: 0)

Comparing performance of: Switch vs Object Literal

Created: 4 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 llama3.1:latest, generated one year ago):