Benchmark: if else vs switch case vs indexOf 2

Script Preparation code:

var X = 2;
var arr = [1, 2, 3, 4, 5];

Tests:

if
if (X > 10) { } else { }
switch
switch (X) { case 1: break; case 2: break; default: }
indexOf
arr.indexOf(X);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if
switch
indexOf

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Windows

View result in a separate tab

Test name	Executions per second
if	6655070.5 Ops/sec
switch	6471815.5 Ops/sec
indexOf	3277840.5 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark measures the performance of three different conditional statements in JavaScript:

1. `if` statement
2. `switch` statement
3. `indexOf()` method (which is not a true conditional statement, but rather an array method)

**Options Compared**

The benchmark compares the performance of these three options:

* `if` statement with a simple comparison (`X > 10`)
* `switch` statement with multiple cases (only one case matches the value of `X`, which is 2)
* `indexOf()` method on an array (`arr.indexOf(X)`)

**Pros and Cons of Each Approach**

1. **If Statement**:
	* Pros: Simple, easy to understand, and widely supported.
	* Cons: May be slower due to the overhead of evaluating a boolean expression.
2. **Switch Statement**:
	* Pros: Can be faster than an `if` statement for multiple cases, but may require more code.
	* Cons: May not be suitable for complex cases or large numbers of options.
3. **IndexOf() Method**:
	* Pros: Optimized for array methods and can be faster in some cases.
	* Cons: Not a true conditional statement, as it searches for the value within an array.

**Library Used**

In this benchmark, no specific library is used beyond the standard JavaScript functions (`indexOf()` method).

**Special JS Features or Syntax**

The `switch` statement uses the `default` clause to specify what happens when none of the cases match. This feature is widely supported in modern JavaScript engines.

**Benchmark Preparation Code**

The provided script preparation code sets two variables: `X` and `arr`, where `X` is set to 2 and `arr` is an array containing five elements.

**Other Alternatives**

If you're considering alternative approaches, here are a few options:

* **Ternary Operator (`?:`)**: This can be faster than an `if` statement for simple cases.
* **Loops**: Using loops (e.g., `for` or `while`) to iterate over an array can be slower than array methods like `indexOf()`.
* **Regular Expressions**: If you need to perform a more complex search, regular expressions might be a good option.

Keep in mind that the performance differences between these approaches may vary depending on the specific use case and JavaScript engine.

Related benchmarks:

if else vs switch case vs indexOf 2 (version: 0)

Comparing performance of: if vs switch vs indexOf

Created: 2 years ago by: Guest

Jump to the latest result

if

switch

indexOf

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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