Benchmark: switch versus if series

Tests:

switch case
const a = 1; switch (a) { case 5: console.log("a is 5"); break; case 4: console.log("a is 4"); break; case 3: console.log("a is 4"); break; case 41: console.log("a is 4"); break; case 31: console.log("a is 4"); break; case 42: console.log("a is 4"); break; case 33: console.log("a is 4"); break; case 44: console.log("a is 4"); break; case 35: console.log("a is 4"); break; case 46: console.log("a is 4"); break; case 37: console.log("a is 4"); break; case 48: console.log("a is 4"); break; case 39: console.log("a is 4"); break; case 40: console.log("a is 4"); break; case 311: console.log("a is 4"); break; case 422: console.log("a is 4"); break; case 333: console.log("a is 4"); break; case 444: console.log("a is 4"); break; case 355: console.log("a is 4"); break; case 2: console.log("a is 2"); break; case 1: console.log("a is 1"); break; }
if series case
const a = 1; if (a == 5) { console.log("a is 5"); } if (a == 4) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 3) { console.log("a is 4"); } if (a == 2) { console.log("a is 2"); } if (a == 1) { console.log("a is 1"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
switch case
if series case

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Windows

View result in a separate tab

Test name	Executions per second
switch case	360117.0 Ops/sec
if series case	367751.6 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, compared, and their pros and cons.

**What is being tested:**

MeasureThat.net is testing two approaches to handle different cases:

1. **Switch statement**: The first test case uses a switch statement with multiple cases to check if the value of `a` matches any of the specified values.
2. **If series**: The second test case uses an if-else chain to check if the value of `a` matches any of the specified values.

**Options compared:**

The two options being compared are:

1. **Switch statement**
2. **If series (with repeated checks)**

**Pros and Cons of each approach:**

**Switch Statement:**

Pros:

* Efficient, as it only executes one block of code for each case.
* Can be more readable when dealing with multiple cases.

Cons:

* May have higher overhead due to the creation of a jump table or array.
* May not work well if the number of cases is very large.

**If Series (with repeated checks):**

Pros:

* Simple and easy to understand.
* No overhead for creating a jump table or array.

Cons:

* Inefficient, as it executes multiple blocks of code even when only one case matches.
* Can lead to performance issues due to the repeated checks.

**Other considerations:**

* **Library usage**: There is no library mentioned in the provided benchmark. However, if a library was used, it would likely provide an optimized implementation for the switch statement or if series approach.
* **Special JS features/syntax**: The benchmark does not use any special JavaScript features or syntax that are not widely supported.

**Alternatives:**

1. **Object-based approach**: Instead of using a switch statement or if series, you could use an object to map values to functions or blocks of code. This approach can be more efficient and easier to read than the traditional switch statement.
2. **Array-based approach**: You could also use an array of functions or blocks of code and iterate over it based on the value of `a`. This approach can be similar to the if series, but more efficient.

In conclusion, the switch statement is generally faster and more efficient than the if series approach, especially for large numbers of cases. However, the if series approach can be simpler and easier to understand, making it a good choice when readability is prioritized over performance.

Related benchmarks:

switch versus if series (version: 0)

Comparing performance of: switch case vs if series case

Created: one year ago by: Guest

Jump to the latest result

switch case

if series case

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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