Benchmark: switch vs if js - MeasureThat.net

Tests:

if
const title = "five" if (title === "one") return if (title === "two") return if (title === "three") return if (title === "four") return if (title === "five") return
switch
const title = "five" switch (title) { case "one": return case "two": return case "three": return case "four": return case "five": return }

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: 11 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:151.0) Gecko/20100101 Firefox/151.0

Browser/OS: Firefox 151 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
if	399532704.0 Ops/sec
switch	392713344.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark, `switch vs if js`, compares the performance of two different approaches: using an `if` statement and using a `switch` statement in JavaScript.

**What is being tested?**

In this benchmark, we're comparing the execution time of two identical code snippets:

1. The first test case uses an `if` statement with multiple conditional statements.
2. The second test case uses a `switch` statement with the same conditions as the `if` statement.

**Options compared:**

The main difference between these two approaches is how they handle the multiple conditions. An `if` statement checks each condition one by one, whereas a `switch` statement checks the value of the variable against a set of cases and executes the corresponding code block.

**Pros and Cons of each approach:**

* **If Statement:**
	+ Pros:
		- More flexible: can be used for any type of condition.
		- Easier to read and maintain.
	+ Cons:
		- Can lead to performance issues with multiple conditions, especially if the code is executed frequently.
* **Switch Statement:**
	+ Pros:
		- More efficient: can handle multiple conditions in a single statement.
		- Reduces code duplication.
	+ Cons:
		- Less flexible: only suitable for cases that involve checking against a set of predefined values.

**Other considerations:**

In this benchmark, the performance difference between `if` and `switch` statements is relatively small. However, if you were to implement these conditions in a real-world application with a large number of cases, using a `switch` statement might be more efficient.

**Library used:**

There doesn't appear to be any external library being used in this benchmark.

**Special JavaScript feature/syntax:**

None are explicitly mentioned. The code snippets only use standard JavaScript syntax and features.

**Other alternatives:**

If you're looking for alternative approaches, consider the following:

1. **Array-based approach:** You can use an array of strings to represent the cases and iterate through it using a `for` loop or `forEach`. This approach is similar to a `switch` statement but allows for more flexibility.
2. **Object-based approach:** Similar to the array-based approach, you can use an object with string values as keys to represent the cases.
3. **Regular expressions:** You can use regular expressions to match against multiple conditions in a single statement.

Keep in mind that these alternatives might introduce additional overhead or complexity compared to using traditional `if` and `switch` statements.

Related benchmarks:

switch vs if js (version: 0)

switch vs if

Comparing performance of: if vs switch

Created: 4 years ago by: Guest

Jump to the latest result

if

switch

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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