Benchmark: Sort Comparator IF statements vs OR (||) assignment

Script Preparation code:

var objs = []
var i = 0
for (i; i < 100000; i++) {
  var obj = {}
  obj.x = Math.random() * 100
  obj.y = Math.random() * 100
  obj.z = Math.random() * 100
  objs.push(obj)
}

Tests:

IF statement
objs.sort((a, b) => { if (a.x != b.x) { return a.x - b.x } if (a.y != b.y) { return a.y - b.y } return a.z - b.z })
OR assignment
objs.sort((a, b) => { return (a.x - b.x) || (a.y - b.y) || (a.z - b.z) })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
IF statement
OR assignment

Fastest: N/A

Slowest: N/A

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

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Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares two approaches for sorting an array of objects using JavaScript: IF statements and OR (||) assignment.

**Script Preparation Code**

The script preparation code generates an array of 100,000 objects with random properties `x`, `y`, and `z`. This is done to provide a consistent input for the sorting function being tested.

**Html Preparation Code**

There is no HTML preparation code provided, which means that the benchmark focuses solely on JavaScript performance.

**Individual Test Cases**

There are two test cases:

1. **IF statement**: This approach uses an inline IF statement within the sorting function. The conditionals are nested, and each conditional returns a value that is used for comparison.
2. **OR assignment**: This approach uses OR (||) assignment to simplify the comparison logic. If any of the conditions in the expression evaluate to true, the whole expression returns true.

**Pros and Cons**

* **IF statements:**
	+ Pros:
		- Can be more readable and maintainable for complex sorting logic.
		- Allows for explicit conditional checks.
	+ Cons:
		- Can lead to increased computation overhead due to nested conditionals.
		- May not perform as well in cases where many objects have the same property values.
* **OR assignment:**
	+ Pros:
		- More concise and efficient, especially when dealing with multiple properties.
		- Can be faster since it avoids explicit conditional checks.
	+ Cons:
		- Less readable and maintainable for complex sorting logic.
		- May not work as expected if any of the conditions are false.

**Library and Special JS Feature/ Syntax**

There is no library used in this benchmark. However, the test case uses a JavaScript feature called **arrow functions**, which was introduced in ECMAScript 2015 (ES6). Arrow functions provide a concise way to define small functions without declaring them with `function` or `var`. In this benchmark, arrow functions are used to simplify the sorting function.

**Alternative Approaches**

Other approaches for sorting arrays of objects might include:

* Using built-in methods like `Array.prototype.sort()` and providing a custom comparison function.
* Utilizing external libraries like Lodash or Ramda.
* Implementing a merge sort or other stable sorting algorithm.
* Leveraging WebAssembly (WASM) or other just-in-time (JIT) compilation options.

Keep in mind that the choice of approach depends on specific requirements, performance constraints, and personal coding style.

Related benchmarks:

Sort Comparator IF statements vs OR (||) assignment (version: 0)

Comparing performance of: IF statement vs OR assignment

Created: 7 years ago by: Guest

Jump to the latest result

IF statement

OR assignment

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):