Benchmark: switch vs if 50IT

HTML Preparation code:

<div class="test"></div>

Script Preparation code:

var v = 26;

Tests:

switch
switch (v) { case 1: break; case 2: break; case 3: break; case 4: break; case 5: break; case 6: break; case 7: break; case 8: break; case 9: break; case 10: break; case 11: break; case 12: break; case 13: break; case 14: break; case 15: break; case 16: break; case 17: break; case 18: break; case 19: break; case 20: break; case 21: break; case 22: break; case 23: break; case 24: break; case 25: break; default: break; }
if
if (v === 1) { } else if (v === 2) { } else if (v === 3) { } else if (v === 4) { } else if (v === 5) { } else if (v === 6) { } else if (v === 7) { } else if (v === 8) { } else if (v === 9) { }else if (v === 10) { }else if (v === 11) { }else if (v === 12) { }else if (v === 13) { }else if (v === 14) { }else if (v === 15) { }else if (v === 16) { }else if (v === 17) { }else if (v === 18) { }else if (v === 19) { }else if (v === 20) { }else if (v === 21) { }else if (v === 22) { }else if (v === 23) { }else if (v === 24) { }else if (v === 25) { }else {}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
switch
if

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided JSON represents two individual test cases for comparing the performance of `switch` statements and `if` statements in JavaScript. Both tests are designed to run a series of conditional checks on a variable `v`, which is set to 26 using the "Script Preparation Code".

**Options compared:**

Two options are being compared:

1. **Switch statement**: The first test case uses a `switch` statement to check the value of `v`. The switch statement has 25 cases, each with a different value for `v`, and breaks out of the loop when a match is found.
2. **If-else chain**: The second test case uses an `if` statement in a chained structure to achieve similar results as the `switch` statement.

**Pros and cons of each approach:**

**Switch statement:**

Pros:

* More concise and readable code for simple cases
* Can be faster for small numbers of cases due to branch prediction

Cons:

* Not suitable for large numbers of cases or dynamic values
* Can lead to "fall-through" issues if multiple cases have the same value

**If-else chain:**

Pros:

* More flexible and adaptable to changing conditions
* Suitable for large numbers of cases and dynamic values

Cons:

* Longer and more verbose code
* May suffer from slower execution due to increased branch prediction penalties

**Other considerations:**

In general, switch statements are faster than if-else chains when the number of cases is small. However, as the number of cases increases, if-else chains become more suitable due to their ability to handle dynamic values and larger codebases.

**Library and syntax:**

There are no specific libraries mentioned in the provided JSON. The tests only rely on standard JavaScript features.

**Special JS feature or syntax:**

None of the tests utilize any special JavaScript features or syntax beyond standard conditional statements.

**Benchmark preparation and execution:**

The benchmark definition provides the initial setup for each test case, including the script preparation code and HTML preparation code. The individual test cases are then executed multiple times to generate the final results, which include metrics such as executions per second.

**Alternatives:**

Some alternatives for benchmarking JavaScript performance might include:

* V8's `Benchmark` API (for Chrome-specific benchmarks)
* Node.js' `benchmark` library
* Mozilla's `jsperf` tool

These tools provide more advanced features and flexibility for creating custom benchmarks, but may also introduce additional complexity.

Related benchmarks:

switch vs if 50IT (version: 0)

Comparing performance of: switch vs if

Created: 4 years ago by: Guest

Jump to the latest result

switch

if

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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