Benchmark: switch vs arrow functions returned JSON

Tests:

switch
const getAnimals = (n) => { switch (n) { case 'Lion': return 'Rei Leão Ahhhhhh'; case 'Chicken': return 'A galinha pintadinha'; } return '404'; } getAnimals('Lion')
Arrow functions JSON
const getAnimals = (n) => ({ 'Lion':'Rei Leão Ahhhhhh', 'Chicken':'A galinha pintadinha' }[n] || '404') getAnimals('Lion')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
switch
Arrow functions JSON

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

The benchmark compares two approaches:

1. **Switch statement**: The `switch` statement is used to execute different blocks of code based on the value of a variable.
2. **Arrow functions with JSON lookup**: This approach uses an arrow function to return a value from a JSON object based on a provided key.

**Pros and Cons:**

* **Switch statement**:
	+ Pros: Can be more readable and maintainable for simple cases, as it explicitly states the condition and the code to execute.
	+ Cons: Can be slower due to the overhead of branching and may not perform well with large numbers of cases.
* **Arrow functions with JSON lookup**:
	+ Pros: Can be faster and more concise, as it eliminates the need for explicit branching. It's also a good fit for situations where the data is already in a structured format (like a JSON object).
	+ Cons: May require more code to achieve the same result, making it less readable for some developers.

**Library usage:** None of the provided benchmark definitions use external libraries.

**Special JS feature/syntax:** The `Arrow functions` syntax (`const getAnimals = (n) => { ... }`) is a modern JavaScript feature introduced in ECMAScript 2015. It allows for concise and expressive function definitions, often replacing traditional `function` declarations.

**Benchmark preparation code:** The provided script preparation code includes the actual benchmark definition, which defines two functions: `getAnimals` with a switch statement and another one using arrow functions with JSON lookup. There is no additional setup or configuration required to run these benchmarks.

Other alternatives for testing similar scenarios:

* **Object literal vs. if-else statements**: This approach compares the performance of direct object access (`{ 'key': 'value' }`) against using an `if-else` statement.
* **Loops with array iteration**: This benchmark tests different loop structures (e.g., `for`, `forEach`, `while`) for iterating over arrays, which can have significant performance implications.
* **Regular expressions vs. string manipulation functions**: This comparison examines the speed of using regular expressions (`/regex/`) against other built-in string manipulation functions like `indexOf()` or `slice()`.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0

Browser/OS: Firefox 88 on Ubuntu

View result in a separate tab

Test name	Executions per second
switch	673546752.0 Ops/sec
Arrow functions JSON	614139648.0 Ops/sec

Related benchmarks:

switch vs arrow functions returned JSON (version: 0)

Comparing performance of: switch vs Arrow functions JSON

Created: 4 years ago by: Guest

Jump to the latest result

switch

Arrow functions JSON

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):