Benchmark: Switch vs If javascript tester

Script Preparation code:

function testIf() {
	if (1 === 3) {
		return false;
	} else if (1 === 2){
		return false;
    } else if (1 === 1){
		return true;
	}
}

function testSwitch() {
	switch (1) {
      case 3:
        return false;
      case 2:
        return false;
      case 1:
        return true;
	}
}

Tests:

If
testIf()
Switch
testSwitch()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
If
Switch

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101 Firefox/52.0

Browser/OS: Firefox 52 on Windows XP

View result in a separate tab

Test name	Executions per second
If	197904080.0 Ops/sec
Switch	227922256.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**What is being tested?**

The provided benchmark measures the performance of two JavaScript constructs: `if` statements and `switch` statements. The test cases compare the execution speed of these two constructs for a specific use case, where the conditionals are nested with multiple branches.

**Options compared**

Two options are compared:

1. **If statements**: This is a basic conditional statement that checks if a certain condition is true.
2. **Switch statements**: This is a control structure that allows you to execute different blocks of code based on the value of an expression.

**Pros and cons of each approach**

Both `if` statements and `switch` statements have their own advantages and disadvantages:

*   **If statements**:
    *   Pros:
        *   Easy to understand and implement
        *   Flexibility in adding new conditions
    *   Cons:
        *   Can be slower than switch statements for large numbers of cases
        *   May require more computations due to the overhead of evaluating each condition
*   **Switch statements**:
    *   Pros:
        *   Faster execution compared to if statements, especially for a fixed number of cases
        *   Less computation required since only one expression needs to be evaluated
    *   Cons:
        *   More complex and harder to understand, especially for beginners
        *   May require additional code to handle unknown or invalid values

**Library: `switch` statement**

The `switch` statement is a built-in JavaScript construct that allows you to execute different blocks of code based on the value of an expression. It is implemented in the browser engine and takes advantage of the CPU's ability to jump to specific locations in memory.

**Special JS feature: `===` operator**

The `===` operator is used for comparison, which checks whether two values are both equal and of the same data type. In this benchmark, the `if` statements use this operator to compare values.

**Other considerations**

When choosing between `if` statements and `switch` statements, consider the following:

*   **Number of cases**: If you have a small number of cases, an `if` statement might be more suitable. However, for large numbers of cases, a `switch` statement can provide better performance.
*   **Complexity**: If your code needs to handle complex logic or multiple conditions, an `if` statement with nested conditionals might be a better choice.

**Other alternatives**

If you're looking for alternative approaches to comparison and conditional execution in JavaScript, consider:

1.  **Using bitwise operators**: You can use bitwise operators like `&`, `|`, and `^` to compare values.
2.  **Using regular expressions**: Regular expressions can be used to match patterns and make comparisons more flexible.
3.  **Using closures**: Closures can encapsulate logic and provide a way to reuse code.

However, for simple conditional execution with multiple branches, the built-in `if` statement and `switch` statement remain the most suitable choices in JavaScript.

Related benchmarks:

Switch vs If javascript tester (version: 0)

Comparing performance of: If vs Switch

Created: 5 months ago by: Guest

Jump to the latest result

If

Switch

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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