Benchmark: If else vs switch case

Tests:

if and else
let value = "lol"; if(value === "no") { console.log("hii") } else if(value === "ye") { console.log("nope") } else if(value === "lol") { console.log("ok lol") }
switch case
let value = "lol"; switch(value) { case "no": console.log("hii"); break; case "ye": console.log("nope"); break; case "lol": console.log("ok lol"); break; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if and else
switch case

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.15

Browser/OS: Safari 17 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
if and else	2055566.9 Ops/sec
switch case	2001353.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is designed to compare the performance of two control structures: if-else and switch-case statements. Both benchmarks involve a similar logic, but they differ in their implementation.

**Options Compared**

In this benchmark, we have two options being compared:

1. **If-Else**: This approach uses an if statement followed by one or more else-if statements to check multiple conditions.
2. **Switch-Case**: This approach uses a switch statement with multiple cases to handle different conditions.

**Pros and Cons of Each Approach**

**If-Else:**

Pros:

* Easy to understand and implement, especially for simple conditions
* Can be used in most programming languages

Cons:

* Can lead to slower performance due to the overhead of conditional checks
* May result in more complex logic, making it harder to maintain

**Switch-Case:**

Pros:

* More efficient than if-else for multiple conditions, as it uses a hash table-like data structure to store and retrieve case values
* Reduces code complexity and makes it easier to add or remove cases

Cons:

* Can be less intuitive for beginners, especially those not familiar with switch statements
* May require more setup and maintenance compared to if-else

**Other Considerations**

When choosing between if-else and switch-case, consider the following factors:

* Number of conditions: If you need to check multiple conditions, switch-case might be a better choice.
* Code complexity: If your logic is simple and straightforward, if-else might be sufficient. However, for more complex conditions or cases, switch-case can help reduce code size and improve readability.

**Library Usage**

There is no explicit library usage in the provided benchmark definition. However, if you're using a JavaScript environment that provides optimizations like just-in-time (JIT) compilation or caching, it might affect the performance comparison.

**Special JS Features/Syntax**

Neither the if-else nor switch-case examples use any special JavaScript features or syntax beyond what is commonly available in most implementations.

**Alternative Approaches**

Other alternatives to consider for similar benchmarks:

* **Arrays**: Instead of using if-else or switch-case, you could use arrays to store and compare values. This approach can be faster due to the overhead of object lookups.
* **Object-based Approach**: Use objects to represent conditions and actions. This approach can provide better encapsulation and flexibility but might require more setup and maintenance.

In summary, MeasureThat.net's benchmark compares the performance of two fundamental control structures in JavaScript: if-else and switch-case statements. By understanding the pros and cons of each approach and considering other factors like code complexity and condition count, you can choose the most suitable method for your specific use case.

Related benchmarks:

If else vs switch case (version: 0)

Comparing performance of: if and else vs switch case

Created: 3 years ago by: Guest

Jump to the latest result

if and else

switch case

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):