Benchmark: if vs else - MeasureThat.net

Script Preparation code:

var name = 'flower'
var color = 'blue'

Tests:

if if - default
if (name === 'car') { if (color === 'green') { return 'green car'; } return 'car' } if (color === 'red') { return 'red flower'; } return 'blue flower';
if if - quick return
if (name === 'flower') { if (color === 'blue') { return 'blue flower'; } return 'flower' } if (color === 'red') { return 'red car'; } return 'green car';
if else if - default
if (name === 'car') { if (color === 'green') { return 'green car'; } else { return 'red car'; } } else if (color === 'red') { return 'red flower'; } return 'red flower';
if else if - quick return
if (name === 'flower') { if (color === 'blue') { return 'blue flower'; } else { return 'red flower'; } } else if (color === 'red') { return 'red car'; } return 'green car';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
if if - default
if if - quick return
if else if - default
if else if - quick return

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

The provided JSON represents a benchmark for comparing the performance of different conditional statement approaches in JavaScript. The test cases are designed to evaluate the execution speed of various `if` and `else if` constructions.

**Benchmark Definition**

The benchmark definition is a simple script that initializes two variables, `name` and `color`, with specific values. This script serves as a preamble for each individual test case.

**Individual Test Cases**

There are four test cases:

1. **"if if - default"**: This test case evaluates the performance of a nested `if` statement with a default condition.
2. **"if if - quick return"**: Similar to the previous test case, but with an additional quick return statement.
3. **"if else if - default"**: This test case compares the performance of an `else if` construction with a default condition.
4. **"if else if - quick return"**: Another variant of the previous test case with a quick return statement.

**Comparison of Options**

The main options being compared are:

* Nested `if` statements (`if (condition1) { if (condition2) { ... } }`)
* Quick returns in nested `if` statements (`return` statement within an `if` block)
* `else if` constructions with default conditions (`else if (condition1) { ... } else { ... }`)
* Quick returns in `else if` constructions

**Pros and Cons of Each Approach**

Here's a brief overview of the pros and cons of each approach:

* Nested `if` statements:
	+ Pros: Can be more readable, allows for multiple conditions to be evaluated.
	+ Cons: May lead to deeper nesting, which can increase complexity and execution time.
* Quick returns in nested `if` statements:
	+ Pros: Reduces the number of executed lines, potentially improving performance.
	+ Cons: May make code harder to read and understand.
* `Else if` constructions with default conditions:
	+ Pros: Allows for a single condition to be evaluated, reducing nesting.
	+ Cons: May lead to more complex logic, making it harder to maintain.
* Quick returns in `else if` constructions:
	+ Pros: Similar benefits to quick returns in nested `if` statements.
	+ Cons: May still make code harder to read and understand.

**Libraries and Special Features**

None of the test cases rely on specific libraries or JavaScript features. However, it's worth noting that the use of `return` statements within conditional blocks is a common pattern in JavaScript.

**Other Considerations**

When evaluating performance in JavaScript, other factors come into play, such as:

* Variable cache: Reusing variables can improve performance by reducing the number of lookups.
* Code optimization: Techniques like dead code elimination, constant folding, and loop unrolling can also impact performance.

**Alternatives**

MeasureThat.net provides a range of alternatives for testing JavaScript microbenchmarks. Some examples include:

* V8 Benchmark Suite: A collection of benchmarks specifically designed to test the performance of Google's V8 engine.
* JSPerf: A benchmarking tool that allows users to compare the performance of different JavaScript implementations.
* WebAssembly Benchmarks: A set of benchmarks for testing the performance of WebAssembly (WASM) implementations.

By understanding the pros and cons of different conditional statement approaches, developers can write more efficient and maintainable code. MeasureThat.net provides a valuable resource for comparing these approaches in a controlled environment.

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
if if - default	15751969.0 Ops/sec
if if - quick return	15731683.0 Ops/sec
if else if - default	15720373.0 Ops/sec
if else if - quick return	15704420.0 Ops/sec

Related benchmarks:

if vs else (version: 0)

Comparing performance of: if if - default vs if if - quick return vs if else if - default vs if else if - quick return

Created: one year ago by: Guest

Jump to the latest result

if if - default

if if - quick return

if else if - default

if else if - quick return

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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