Benchmark: Object Literal x Switch x else if

Script Preparation code:

var today = new Date().getDay()

Tests:

Switch
let day; switch (today) { case 0: day = "Sunday"; break; case 1: day = "Monday"; break; case 2: day = "Tuesday"; break; case 3: day = "Wednesday"; break; case 4: day = "Thursday"; break; case 5: day = "Friday"; break; case 6: day = "Saturday"; break; default: throw new Error("Hey! We have only 7 days in the week"); } console.log(`What day of the week is today? ${day}`);
Object Literal
const dayOfTheWeek = { 0: "Sunday", 1: "Monday", 2: "Tuesday", 3: "Wednesday", 4: "Thursday", 5: "Friday", 6: "Saturday", }; console.log( `What day of the week is today? ${dayOfTheWeek[today]}` );
Else If
let day; if (today === 0){ day = "Sunday"; } else if (today === 1){ day = "Monday"; } else if (today === 2){ day = "Tuesday"; } else if (today === 3){ day = "Wednesday"; } else if (today === 4){ day = "Thursday"; } else if (today === 5){ day = "Friday"; } else if (today === 6){ day = "Saturday"; } else{ throw new Error("Hey! We have only 7 days in the week"); } console.log(`What day of the week is today? ${day}`);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Switch
Object Literal
Else If

Fastest: N/A

Slowest: N/A

Latest 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 benchmark and explain what's being tested.

The provided JSON represents a JavaScript microbenchmark that compares three different approaches to determine the day of the week:

1. **Switch Statement**: This approach uses a switch statement with multiple cases to determine the day of the week based on the current day of the month.
2. **Object Literal**: This approach uses an object literal to map the day numbers to their corresponding day names.
3. **Else If Statement Chain**: This approach uses a chain of else if statements to determine the day of the week.

**What's being tested?**

The benchmark is testing which approach has the fastest execution time for determining the day of the week. The tests are run on a JavaScript engine, and the results are measured in executions per second.

**Options compared:**

* **Switch Statement**: This approach uses a single block of code to determine the day of the week.
* **Object Literal**: This approach uses an object literal to map day numbers to their corresponding day names.
* **Else If Statement Chain**: This approach uses a chain of else if statements to determine the day of the week.

**Pros and Cons:**

* **Switch Statement**:
	+ Pros: Can be more efficient for small number of cases, easier to read and maintain.
	+ Cons: May not work well with large number of cases or complex logic.
* **Object Literal**:
	+ Pros: Flexible and easy to add or remove cases, can be used with arrays or other data structures.
	+ Cons: May require more memory for the object literal, can be less efficient than switch statements for small numbers of cases.
* **Else If Statement Chain**:
	+ Pros: Can handle large number of cases and complex logic, easy to read and maintain.
	+ Cons: Can be slower due to the overhead of checking multiple conditions.

**Library usage:**

There is no library being used in these tests. The benchmark relies solely on standard JavaScript features.

**Special JS feature or syntax:**

None of the tests use any special JavaScript features or syntax that are not part of the standard language.

**Other alternatives:**

If you were to rewrite this benchmark with alternative approaches, some options could be:

* **Regular Expressions**: Using regular expressions to match the day of the week based on a specific pattern.
* **Array Methods**: Using array methods such as `indexOf()` or `find()` to determine the day of the week.
* **Mathematical Functions**: Using mathematical functions such as `mod()` or `floor()` to calculate the day of the week.

However, these alternatives may not be as efficient or readable as the original approaches used in the benchmark.

Related benchmarks:

Object Literal x Switch x else if (version: 0)

Comparing performance of: Switch vs Object Literal vs Else If

Created: 4 years ago by: Guest

Jump to the latest result

Switch

Object Literal

Else If

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):