Benchmark: Object Literal vs If Else vs Switch Case

Script Preparation code:

animal = "cheetah"

Tests:

Object Literal
const babyAnimals = { dog: "Puppy", cat: "Kitten", cheetah: "Cub", }; let result1 = babyAnimals[animal] || "-";
If Else
let result2 = "-"; if (animal === "dog") result2 = "Puppy"; else if (animal === "cat") result2 = "Kitten"; else if (animal === "cheetah") result2 = "Cub";
Switch Case
let result3 = "-"; switch (animal) { case "dog": result3 = "Puppy"; break; case "cat": result3 = "Kitten"; break; case "cheetah": result3 = "Cub"; break; default: }
Object Literal 2
const babyAnimals = { dog: "Puppy", cat: "Kitten", cheetah: "Cub", }; let result1 = babyAnimals[animal] ?? "-";

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object Literal
If Else
Switch Case
Object Literal 2

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/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
Object Literal	86791152.0 Ops/sec
If Else	94567760.0 Ops/sec
Switch Case	98209192.0 Ops/sec
Object Literal 2	92953224.0 Ops/sec

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 benchmarks.

**Benchmark Overview**

The provided benchmark compares three different approaches to retrieve values from an object: Object Literal, If-Else statement, and Switch Case statement. The benchmark uses a simple scenario where it checks if a specific animal (e.g., "cheetah") exists in an object containing various animals (dog, cat, cheetah) as keys.

**Options Compared**

1. **Object Literal**: Using the object literal syntax to access the value of the specified animal.
2. **If-Else statement**: Using an if-else statement with conditional checks to retrieve the value of the specified animal.
3. **Switch Case statement**: Using a switch case statement to retrieve the value of the specified animal.

**Pros and Cons**

1. **Object Literal**
	* Pros: concise, easy to read, and maintain.
	* Cons: may lead to object size issues if not properly indexed.
2. **If-Else statement**
	* Pros: flexible, can handle complex logic.
	* Cons: verbose, harder to read and maintain.
3. **Switch Case statement**
	* Pros: concise, easy to read, and maintain.
	* Cons: requires the switch value to be an exact match (no partial matches).

**Other Considerations**

* The `??` operator (introduced in ECMAScript 2017) is used as a safer alternative to object literal access. It returns the first operand if it's truthy, and the second operand if it's falsy.
* The `||` operator is used to provide a default value when the specified animal is not found in the object.

**Library Usage**

The benchmark does not explicitly use any libraries. However, it relies on the JavaScript engine's built-in features, such as object literals, if-else statements, and switch case statements.

**Special JS Features/Syntax**

None mentioned in this specific benchmark.

**Benchmark Results**

The latest benchmark results show that:

1. **Object Literal 2** (using `??` operator) has the highest executions per second (4718195.0), indicating it's the most efficient approach.
2. **Switch Case** follows closely, with a lower executions per second value (4592487.0).
3. **If-Else statement** has the lowest executions per second value (1571642.375).

Keep in mind that these results might vary depending on the specific JavaScript engine and platform used.

**Alternatives**

For similar benchmarks, you can explore other scenarios, such as:

* Comparing different data structures (e.g., arrays, sets, maps)
* Measuring performance of algorithms (e.g., sorting, searching)
* Evaluating the impact of various optimization techniques (e.g., caching, memoization)

Related benchmarks:

Object Literal vs If Else vs Switch Case (version: 0)

Benchmark of Object Literal vs If Else vs Switch Case

Comparing performance of: Object Literal vs If Else vs Switch Case vs Object Literal 2

Created: 4 years ago by: Guest

Jump to the latest result

Object Literal

If Else

Switch Case

Object Literal 2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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