Benchmark: test if vs select case

Tests:

if
function test(docRecType) { if (docRecType === "File") { return 2 } if (["Attachment", "Ident", "Procedure", "Section", "Step"].includes(docRecType)) { return 3 } if (["Autocomplete", "Category", "FeatureFlag"].includes(docRecType)) { return 4 } if (docRecType === "Event") { return 5 } } test('FeatureFlag')
case
function testB(docRecType) { switch (docRecType) { case "File": return 2 case "Attachment": case "Procedure": case "Ident": case "Section": case "Step": return 3 case "Autocomplete": case "Category": case "FeatureFlag": return 4 case "Event": return 5 default: break } } testB('FeatureFlag')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if
case

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

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Let's dive into the explanation.

**Benchmark Overview**

The benchmark is comparing two approaches to handling different cases in JavaScript: `if` statements and `switch` statements. The goal is to measure which approach is faster, specifically when dealing with multiple conditions.

**Individual Test Cases**

There are two test cases:

1. **"if"**: This test case uses an `if` statement chain to check if a variable (`docRecType`) matches one of several values.
```javascript
function test(docRecType) {
  if (docRecType === "File") return 2;
  if ([...].includes(docRecType)) return 3; // [...]
  if ([...].includes(docRecType)) return 4; // [...]
  if (docRecType === "Event") return 5;
}
```
In this case, the code uses a series of `if` statements to check for specific values in an array.

2. **"case"**: This test case uses a `switch` statement to handle multiple cases.
```javascript
function testB(docRecType) {
  switch (docRecType) {
    case "File": return 2;
    case "Attachment": // ...
    default: break;
  }
}
```
Here, the code uses a `switch` statement with multiple `case` clauses to handle different values.

**Library**

There is no external library used in these test cases. The code only relies on built-in JavaScript features.

**Special JS Feature or Syntax**

The syntax used in this benchmark is standard JavaScript. However, it's worth noting that the `includes()` method is used, which returns a boolean indicating whether an element exists in an array. This method was introduced in ECMAScript 6 (ES6) and has been widely adopted since then.

**Pros/Cons of Each Approach**

* **"if"**: Pros:
	+ Easy to read and understand
	+ Can be used with any type of value (not just strings or numbers)
	+ No strict typing required

Con: May become cumbersome for a large number of cases, leading to "deep nesting" issues.

* **"case"**: Pros:
	+ More concise for a small number of cases
	+ Easier to read and maintain when dealing with multiple cases
	+ Can be used with any type of value (not just strings or numbers)

Con: May require explicit typing, which can make the code less readable if there are many cases.

**Other Considerations**

When deciding between these approaches, consider the following:

* **Number of cases**: If you have a small number of cases (< 5-6), using `switch` might be more concise. For larger numbers, an `if` chain or other approaches (e.g., using an object or array to store values) might be better.
* **Code readability**: Use the approach that makes the code most readable and maintainable for your specific use case.

**Alternatives**

Other alternatives include:

* Using an object or array to store values, like this: `const cases = { 'File': 2, ... }; return cases[docRecType] || defaultCase;`
* Utilizing a more modern approach, such as using a mapping function (`Object.values()` or `Array.prototype.map()`) and a conditional operator (`ternary expression`).
* Using a specialized library or utility (e.g., `cases` from the `lodash` library).

Keep in mind that these alternatives might not be directly comparable to the original test cases, so results may vary.

Related benchmarks:

test if vs select case (version: 0)

Comparing performance of: if vs case

Created: 3 years ago by: Guest

Jump to the latest result

if

case

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):