Benchmark: If vs Switch - MeasureThat.net

Script Preparation code:

const value = 'Cancelled';

Tests:

ifTest1
function ifTest1() { if(value === 'Rejected' || value === 'Cancelled'){ return true; } }
ifTest2
function ifTest2() { if(value === 'Blue' || value === 'Red') { return false; } if(value === 'Rejected' || value === 'Cancelled'){ return true; } }
ifTest3
function ifTest3() { if(value === 'Rejected' || value === 'Cancelled'){ return true; } if(value === 'Blue' || value === 'Red') { return false; } }
switchTest1
function switchTest1() { switch(value) { case 'Rejected': return true; case 'Cancelled': return true; } }
switchTest2
function switchTest2() { switch(value) { case 'Rejected': return true; case 'Cancelled': return true; default: return false; } }
switchTest3
function switchTest3() { switch(value) { case 'Rejected': return true; case 'Blue': return false; case 'Red': return false; case 'Cancelled': return true; default: return false; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ifTest1
ifTest2
ifTest3
switchTest1
switchTest2
switchTest3

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser/OS: Chrome 145 on Mac OS X 10.15.7

View result in a separate tab

ifTest2

170.5M/s

ifTest1

167.2M/s

switchTest3

166.5M/s

switchTest1

165.2M/s

ifTest3

163.5M/s

switchTest2

161.8M/s

View exact numbers

Test name	Executions per second
✓ ifTest2	170,528,848 Ops/sec
ifTest1	167,202,224 Ops/sec
switchTest3	166,487,920 Ops/sec
switchTest1	165,246,816 Ops/sec
ifTest3	163,482,128 Ops/sec
switchTest2	161,809,152 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 benchmark and explain what's being tested, compared options, pros and cons, and other considerations.

**Benchmark Overview**

The benchmark is comparing the performance of `if` statements versus `switch` statements in JavaScript. The test cases use a fixed value `'Cancelled'` as input to the functions.

**Test Cases**

There are four test cases:

1. `ifTest1`: A simple `if` statement that checks if the value is either `'Rejected'` or `'Cancelled'`.
2. `ifTest2`: Another simple `if` statement that first checks if the value is not equal to `'Blue'` or `'Red'`, and then checks if it's `'Rejected'` or `'Cancelled'`.
3. `ifTest3`: An `if` statement with two branches, where the first branch checks for `'Rejected'` or `'Cancelled'`, and the second branch checks for `'Blue'` or `'Red'`.
4. `switchTest1`: A `switch` statement that checks if the value is either `'Rejected'` or `'Cancelled'`.
5. `switchTest2`: Another `switch` statement with a default case that returns false.
6. `switchTest3`: A `switch` statement with multiple cases, including one for `'Cancelled'`, which returns true.

**Options Being Compared**

The benchmark is comparing the performance of:

* Simple `if` statements
* Complex `if` statements (e.g., `ifTest2`)
* Switch statements

**Pros and Cons**

Here are some pros and cons of each approach:

* **Simple `if` statements**: Easy to read and maintain, but may lead to slower performance due to the overhead of multiple branch checks.
	+ Pros: Easy to write and understand
	+ Cons: May be slower than switch statements
* **Complex `if` statements**: Can be more efficient than simple `if` statements, but can be harder to read and maintain.
	+ Pros: May be faster than simple `if` statements
	+ Cons: More difficult to read and maintain
* **Switch statements**: Often the fastest way to perform multiple checks, but require a fixed number of cases to be defined.
	+ Pros: Fastest way to perform multiple checks
	+ Cons: Requires defining all possible cases upfront

**Other Considerations**

* The benchmark is using a fixed value for the input to the functions, which may not reflect real-world scenarios where the input values are dynamic.
* The benchmark is only considering performance and does not account for other factors like code readability or maintainability.
* The use of `const` to declare variables (e.g., `const value = 'Cancelled';`) suggests that the benchmark is using modern JavaScript features.

**Alternatives**

If you're looking for alternatives to this benchmark, here are a few options:

* **Test `switch` statements with different case orders**: Varying the order of cases in the switch statement can affect performance.
* **Test `if` statements with different branching patterns**: Experimenting with different branching patterns (e.g., nested if statements) can help optimize code for specific use cases.
* **Test other control flow constructs**: Consider testing other JavaScript control flow constructs, such as `loop` statements or `try-catch` blocks.

Keep in mind that these alternatives may require additional setup and configuration to achieve meaningful results.

If vs Switch (version: 0) Benchmark.js

Comparing performance of: `ifTest1 vs ifTest2 vs ifTest3 vs switchTest1 vs switchTest2 vs switchTest3`

Created: 8 years ago by: Guest

Go to the latest result

ifTest1

ifTest2

ifTest3

switchTest1

switchTest2

switchTest3

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

If vs Switch (version: 0) Benchmark.js

Comparing performance of: ifTest1 vs ifTest2 vs ifTest3 vs switchTest1 vs switchTest2 vs switchTest3

Created: 8 years ago by: Guest

Go to the latest result

ifTest1

ifTest2

ifTest3

switchTest1

switchTest2

switchTest3

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `ifTest1 vs ifTest2 vs ifTest3 vs switchTest1 vs switchTest2 vs switchTest3`