Benchmark: Switch: str v object

Script Preparation code:

function Metric1(name) {this.name = name;}

Metric1.TEST1 = new Metric1("TEST1");
Metric1.TEST2 = new Metric1("TEST2");
Metric1.TEST3 = new Metric1("TEST3");

var Metric2 = {
  TEST1: "TEST1",
  TEST2: "TEST2",
  TEST3: "TEST3"
};

Tests:

String
var i = 0; var metric = Metric2.TEST3; switch(metric) { case "TEST1": i += 1; break; case "TEST2": i += 2; break; case "TEST3": i += 3; break; }
Object
var i = 0; var metric = Metric1.TEST3; switch(metric) { case Metric1.TEST1: i += 1; break; case Metric1.TEST2: i += 2; break; case Metric1.TEST3: i += 3; break; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String
Object

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 break down the benchmark and its components.

**Benchmark Definition**

The provided JSON defines two test cases, both of which involve testing a `switch` statement with different data types: strings and objects.

1. **String Test Case**: The script preparation code creates an object called `Metric2` with three properties (`TEST1`, `TEST2`, and `TEST3`) that are set to string values ("TEST1", "TEST2", and "TEST3"). The benchmark definition itself is a simple `switch` statement that increments an integer variable `i` based on the value of the `metric` variable, which is set to one of these strings.

2. **Object Test Case**: This test case is identical to the string test case, except that the object property names are used directly (e.g., `Metric1.TEST3`) instead of being set as string values like in the string test case.

**Comparison of Options**

The two test cases differ only in how they handle the `switch` statement:

* **String Test Case**: The `switch` statement uses string literals as its cases. This means that the browser must perform a string comparison to determine which case to execute.
* **Object Test Case**: The `switch` statement uses object property names directly as its cases. This allows for faster lookups and comparisons, as the browser can use optimized object lookup mechanisms.

**Pros and Cons of Each Approach**

1. **String Test Case:**
	* Pros:
		+ Easier to understand and write code with string literals.
	* Cons:
		+ May lead to slower performance due to string comparison overhead.
2. **Object Test Case:**
	* Pros:
		+ Can provide faster performance benefits due to optimized object lookup mechanisms.
	* Cons:
		+ Requires more complex setup and understanding of objects and property names.

**Library/Functionality Used**

In both test cases, the `Metric1` function is used. However, in the string test case, its properties are accessed as strings (`Metric1.TEST1`, etc.), while in the object test case, they are accessed directly using object syntax (e.g., `Metric1.TEST3`). The purpose of this function is not explicitly stated, but it appears to be a simple utility function that returns an instance with specific properties.

**Special JS Features/Syntax**

The benchmark uses some basic JavaScript concepts:

* Object literals (`{}`) are used to create objects.
* Property assignment (`=`) is used to set values for object properties.
* String interpolation (`\r\n`) is used to insert newline characters in the script preparation code.

Overall, this benchmark tests two common use cases for `switch` statements in JavaScript: using string literals and object property names as cases. The results will indicate which approach provides faster performance on supported browsers.

Related benchmarks:

Switch: str v object (version: 0)

Comparing performance of: String vs Object

Created: 9 years ago by: Guest

Jump to the latest result

String

Object

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):