Benchmark: Switch test 2 - MeasureThat.net

Tests:

Switch
let value = 5; switch (value) { case 0: { valueIndex = 0; break; } case 6: { valueIndex = 1; break; } default: { valueIndex = 2; } }
If
let value = 5; if (value === 0) { valueIndex = 0; } else if (value === 6) { valueIndex = 1; } else { valueIndex = 2; }
Other
let value = 5; valueIndex = value === 0 ? 0 : value === 6 ? 1 : 2

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Switch
If
Other

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser/OS: Chrome 80 on Mac OS X 10.13.6

View result in a separate tab

Test name	Executions per second
Switch	4171789.5 Ops/sec
If	4010770.0 Ops/sec
Other	4079896.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents a JavaScript benchmark test case created on MeasureThat.net. The goal of this benchmark is to compare the performance of different approaches for making decisions using conditional statements: `switch`, `if-else` (more specifically, `if-else if`) and an alternative approach that uses the ternary operator.

**Switch Statement**

The first test case uses a traditional `switch` statement:
```javascript
let value = 5;
switch (value) {
  case 0:
    valueIndex = 0;
    break;
  case 6:
    valueIndex = 1;
    break;
  default:
    valueIndex = 2;
}
```
This approach is straightforward but may have performance implications due to the overhead of evaluating the `switch` expression and navigating through its cases.

**If-Else Statement**

The second test case uses an `if-else` statement with multiple conditions:
```javascript
let value = 5;
if (value === 0) {
  valueIndex = 0;
} else if (value === 6) {
  valueIndex = 1;
} else {
  valueIndex = 2;
}
```
This approach is more verbose than the `switch` statement but can be more efficient due to the use of short-circuit evaluation.

**Alternative Approach using Ternary Operator**

The third test case uses a ternary operator to achieve similar results:
```javascript
let value = 5;
valueIndex = value === 0 ? 0 : value === 6 ? 1 : 2;
```
This approach is concise but may be less readable than the `if-else` or `switch` statements.

**Performance Considerations**

When comparing these approaches, consider the following:

* **Switch statement**: May have higher overhead due to the number of cases and the need to evaluate each case's expression.
* **If-Else Statement**: More efficient due to short-circuit evaluation but may be slower for large numbers of conditions. However, this approach allows for easy addition of more conditions without changing the overall structure.
* **Alternative Approach using Ternary Operator**: Concise and readable but may lead to less intuitive code, making it harder to understand and maintain.

**Library Used**

None of these approaches rely on external libraries. The `switch` statement uses a built-in JavaScript construct, while the `if-else` statement is also built-in. The ternary operator is a built-in feature of JavaScript as well.

**Special JS Feature or Syntax**

None of these approaches use any special JavaScript features or syntax beyond the basic constructs mentioned above.

**Other Alternatives**

Other alternatives for making decisions using conditional statements include:

* **Loops**: Using `while` loops to repeatedly execute a block of code until a condition is met.
* **Bitwise operations**: Using bitwise operators (e.g., `&`, `|`, `^`) to make decisions based on binary values.
* **Regular expressions**: Using regular expressions to match patterns in strings and make decisions.

However, these alternatives are not as straightforward or commonly used for simple decision-making cases like the ones presented in this benchmark.

Related benchmarks:

Switch test 2 (version: 0)

Switch test 2

Comparing performance of: Switch vs If vs Other

Created: 4 years ago by: Guest

Jump to the latest result

Switch

If

Other

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):