Benchmark: switch vs if -jmf

HTML Preparation code:

<div class="test"></div>

Script Preparation code:

var v = 'ABC';

Tests:

switch
switch (v) { case 'DEF': case 'HIJ': case 'KLM': default: ; }
if
if (v === 'DEF' || v === 'HIJ' || v === 'KLM') { }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
switch
if

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The provided JSON represents a benchmark definition, which includes the following information:

* `Name`: A unique name for the benchmark.
* `Description`: An optional description of the benchmark (empty in this case).
* `Script Preparation Code` and `Html Preparation Code`: These are used to set up the test environment. In this case, they simply assign a string value `v` to `'ABC'` and create a basic HTML element, respectively.

**Individual Test Cases**

There are two test cases defined:

1. **Switch Statement**: This test case uses a switch statement to compare the value of `v` with multiple values.
2. **If Statement**: This test case uses an if statement to compare the value of `v` with multiple values using logical OR (`||`) operators.

**Options Compared**

In this benchmark, two options are compared:

1. **Switch Statement**: The switch statement is used in the first test case, while an if statement is used in the second test case.
2. **If Statement with Logical OR**: The if statement with logical OR operators is used in the second test case.

**Pros and Cons of Each Approach**

Here are some pros and cons of each approach:

* **Switch Statement**:
	+ Pros: Can be more efficient than if statements, especially when dealing with multiple values.
	+ Cons: Can be less readable for complex cases, as it requires a `break` statement to exit the switch block. Additionally, not all browsers support switch expressions (see note).
* **If Statement with Logical OR**:
	+ Pros: Easier to read and maintain than switch statements, especially for simple cases.
	+ Cons: Can be slower due to the need to evaluate multiple conditions.

Note that switch statements are generally faster in modern JavaScript engines because they allow the compiler to optimize the code more effectively. However, this advantage may not always be noticeable, and readability should still be considered when choosing between these approaches.

**Library Usage**

In neither of the provided test cases is a specific library used. The benchmark focuses solely on comparing the performance of switch statements and if statements with logical OR operators.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax mentioned in this benchmark. However, it's worth noting that some modern browsers support switch expressions, which can make code more concise and readable. MeasureThat.net might consider using a switch expression in a future benchmark to compare its performance against traditional switch statements.

**Other Alternatives**

Some other alternatives for comparing the performance of different control flow constructs include:

* Using a loop instead of an if statement or switch
* Comparing multiple values in an array or object
* Using a function with multiple return paths (e.g., using early returns)

However, these alternatives might not be directly comparable to the provided benchmark, as they introduce additional complexity and nuances that would need to be accounted for.

Overall, this benchmark provides a straightforward comparison between switch statements and if statements with logical OR operators, allowing users to easily understand and compare their performance.

Related benchmarks:

switch vs if -jmf (version: 1)

Comparing performance of: switch vs if

Created: 4 years ago by: Registered User

Jump to the latest result

switch

if

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):