Benchmark: JS if/if vs if/else if

Script Preparation code:

var test = 'test'

Tests:

if/if
if (test === 'test1') { return true; } if (test === 'test2') { return true; } if (test === 'test3') { return true; } if (test === 'test4') { return true; } if (test === 'test5') { return true; }
if/else if
if (test === 'test1') { return true; } else if (test === 'test2') { return true; } else if (test === 'test3') { return true; } else if (test === 'test4') { return true; } else if (test === 'test5') { return true; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if/if
if/else if

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0

Browser/OS: Firefox 140 on Ubuntu

View result in a separate tab

Test name	Executions per second
if/if	127404832.0 Ops/sec
if/else if	128987360.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is tested, compared options, pros and cons of those approaches, and other considerations.

**Benchmark Definition**

The benchmark defines two test cases: `if/if` and `if/else if`. The goal is to compare the performance difference between using multiple `if` statements and an open-ended `if/else if` structure in JavaScript.

**Options Compared**

Two options are compared:

1. **Multiple `if` statements**: Each test case uses a separate `if` statement with a conditional expression that checks for a specific value of the `test` variable.
2. **Open-ended `if/else if` structure**: The second test case uses an `if/else if` structure, where each clause is checked in sequence until a condition is true.

**Pros and Cons**

**Multiple `if` statements:**

Pros:

* Easy to understand and maintain
* Can be used when each condition is independent

Cons:

* Can lead to performance issues due to the overhead of multiple function calls
* May not be suitable for large numbers of conditions

**Open-ended `if/else if` structure:**

Pros:

* Can be more efficient, as only one loop is needed
* Can handle a large number of conditions without performance degradation

Cons:

* Can be less intuitive to read and maintain
* Requires careful consideration when adding new conditions

**Other Considerations**

* The benchmark uses a simple `test` variable with pre-defined values (`'test1'`, `'test2'`, etc.). In real-world scenarios, this would typically be replaced with user-input or dynamic data.
* The benchmark is run in a browser (Chrome 129) on a Mac OS X system. Results may vary across different browsers and operating systems.

**Library Used**

There is no explicit library mentioned in the benchmark definition. However, the `if` and `else if` statements are part of the JavaScript language itself.

**Special JS Feature or Syntax**

The benchmark does not use any special JavaScript features or syntax that would require specific browser support or configuration.

**Alternative Approaches**

Other alternatives to compare performance could include:

* Using a switch statement instead of multiple `if` statements
* Implementing a custom lookup table for condition values
* Comparing the performance of different JavaScript engines (e.g., V8 vs. SpiderMonkey)

Keep in mind that these alternative approaches may have varying degrees of complexity, maintainability, and potential performance impact.

Related benchmarks:

JS if/if vs if/else if (version: 0)

Benchmark of the speed difference between using multiple IF statements and an open-ended IF/ELSE IF.

Comparing performance of: if/if vs if/else if

Created: 8 years ago by: Guest

Jump to the latest result

if/if

if/else if

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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