Benchmark: Switch vs Object Literal Two Point Zero Two Onee

Script Preparation code:

var str = 'abc';
str = str.charAt(Math.floor(Math.random() * 3));

Tests:

Switch
switch (str) { case 'a': console.log('A'); break; case 'b': console.log('B'); break; case 'c': console.log('C'); break; }
Object Literal
const a = () => console.log('A') const b = () => console.log('B') const c = () => console.log('C') const objLiteral = { a: a, b: b, c: c } objLiteral[str]();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Switch
Object Literal

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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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 test cases: `Switch` and `Object Literal`. The goal of these tests is to compare the performance of two approaches for accessing an object property using a string key.

In the first test case, `Switch`, the code uses a traditional `switch` statement to access the `str` variable. In the second test case, `Object Literal`, the code uses an object literal syntax to access the same `str` variable.

**Options compared**

The two approaches being tested are:

1. Traditional `switch` statement
2. Object literal syntax

These options differ in how they handle string keys and performance implications.

**Pros and Cons:**

* **Traditional `switch` statement:**
	+ Pros:
		- Easier to read and maintain for simple cases
		- Can be more intuitive for developers familiar with traditional switch statements
	+ Cons:
		- May lead to slower performance due to the overhead of evaluating multiple cases
		- Not ideal for large number of cases or complex logic
* **Object literal syntax:**
	+ Pros:
		- Can lead to faster performance due to caching and optimized lookup
		- Allows for more concise and expressive code
	+ Cons:
		- May require additional setup and configuration (e.g., defining a function for each property)
		- Less intuitive for developers unfamiliar with object literals

**Library usage**

There is no explicit library mentioned in the provided JSON. However, some JavaScript engines, like V8, have built-in optimizations that might influence the performance results.

**Special JS feature or syntax**

No special features or syntax are mentioned in the provided test cases. Both approaches use standard JavaScript syntax.

**Other alternatives**

If you were to consider alternative approaches for accessing object properties using string keys, some options could include:

1. **Array index access**: `obj[str]`
2. **Function call with a callback**: `obj[str]()`
3. **Using a library like Lodash or Underscore.js**, which provide optimized implementations for various cases

Keep in mind that these alternatives might not be as straightforward to implement and understand as the traditional `switch` statement or object literal syntax.

In summary, the `Switch` test case uses a traditional `switch` statement, while the `Object Literal` test case leverages an object literal syntax. Both approaches have their trade-offs, and the choice between them depends on the specific use case, performance requirements, and personal preference.

Related benchmarks:

Switch vs Object Literal Two Point Zero Two Onee (version: 0)

Comparing performance of: Switch vs Object Literal

Created: 6 years ago by: Guest

Jump to the latest result

Switch

Object Literal

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):