Benchmark: testing ifs without else if

Tests:

only if
for(let i=0; i< 1000000; i++) { const brand = 'azulzinho'; if(brand === 'visa') {} if(brand === 'amex') {} if(brand === 'azulzinho') {} if(brand === 'master') {} if(brand === 'discover') {} }
if with else if
for(let i=0; i< 1000000; i++) { const brand = 'azulzinho'; if(brand === 'visa') {} else if(brand === 'amex') {} else if(brand === 'azulzinho') {} else if(brand === 'master') {} else if(brand === 'discover') {} }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
only if
if with else if

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
only if	3170.1 Ops/sec
if with else if	3187.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the provided benchmark JSON and explore what's being tested.

**What is being tested?**

The benchmark is testing two approaches to conditional statements in JavaScript:

1. **If statement with multiple `if` conditions**: In this approach, the code uses separate `if` statements for each condition.
2. **If-else if statement**: This approach combines multiple conditions into a single `if-else if` statement.

**Options compared**

The benchmark is comparing the performance of these two approaches:

* Approach 1: Separate `if` statements (`"only if"` test case)
* Approach 2: If-else if statement (`"if with else if"` test case)

**Pros and cons of each approach:**

1. **Approach 1 (Separate `if` statements)**:
	* Pros:
		+ Easier to read and maintain, as the code is split into clear, concise blocks.
		+ Less chance of unexpected behavior due to condition overlap or missing `else` clauses.
	* Cons:
		+ May result in more overhead due to the additional function calls (e.g., `if`) and branching instructions.
2. **Approach 2 (If-else if statement)**:
	* Pros:
		+ Reduces code size and overhead, as a single instruction can handle multiple conditions.
		+ Can lead to better optimization opportunities during code generation or execution.
	* Cons:
		+ May be harder to read and understand due to the combined conditions, potentially introducing errors or ambiguities.

**Library usage**

In this benchmark, no libraries are used. The focus is solely on the JavaScript syntax and conditional statements.

**Special JS features/syntax**

There's one notable aspect of the benchmark: the use of a **`const` declaration** for the variable `brand`. This feature was introduced in ECMAScript 2015 (ES6) to declare constants that cannot be reassigned. Its usage here helps illustrate how modern JavaScript syntax can improve code clarity and expressiveness.

**Other alternatives**

For this specific benchmark, the alternative approaches would be:

* Using a **switch statement** instead of `if`/`else if`.
* Employing a more advanced conditional construct, such as **template literals** or **conditional operators (?:)**.
* Utilizing a library like Lodash's `ifElse` function to implement the `if-else if` structure.

Keep in mind that these alternatives might not directly compare to the original code, and their performance implications may vary depending on the specific use case and implementation.

Related benchmarks:

testing ifs without else if (version: 0)

Comparing performance of: only if vs if with else if

Created: 3 years ago by: Guest

Jump to the latest result

only if

if with else if

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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