Benchmark: Boolean constructor vs in Equality check in javascript

Script Preparation code:

var isNull = null
var sEmpty = '';
var sFilled = 'Foo';
var nZero = 0;
var nOne = 1;

Tests:

Boolean constructor test
Boolean(isNull) Boolean(sEmpty) Boolean(sFilled) Boolean(nZero) Boolean(nOne)
Equality check
isNull === true isNull === false sEmpty === true sFilled === true nZero === true nOne === true

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Boolean constructor test
Equality check

Fastest: N/A

Slowest: N/A

Latest run results:

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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 is being tested.

**Benchmark Overview**

The benchmark compares two approaches for checking boolean values in JavaScript:

1. **Boolean Constructor**: Using the `Boolean` constructor to create a boolean value (e.g., `Boolean(isNull)`).
2. **Equality Check**: Directly comparing the value with `true` or `false` using the `===` operator (e.g., `isNull === true`).

**Options Compared**

The two options being compared are:

* Using the `Boolean` constructor to create a boolean value
* Directly comparing the value with `true` or `false` using the `===` operator

**Pros and Cons of Each Approach**

1. **Boolean Constructor**:
	* Pros:
		+ Can be more explicit and clear in its intent, especially when dealing with complex boolean logic.
		+ Can help avoid implicit conversions that might occur when comparing values directly with `true` or `false`.
	* Cons:
		+ May incur additional overhead due to the creation of a new object and its properties.
		+ Might be less efficient than direct comparisons, especially in cases where the value is already a boolean.
2. **Equality Check**:
	* Pros:
		+ Typically faster and more efficient, as it only compares the values without creating new objects or executing additional logic.
		+ Can be beneficial when dealing with large datasets or performance-critical code.
	* Cons:
		+ May lead to implicit conversions that can be confusing or unexpected in certain situations.
		+ Requires careful handling of edge cases, such as null or undefined values.

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition. However, it's worth noting that JavaScript has a built-in `Boolean` constructor that creates a new boolean object with the specified value.

**Special JS Features or Syntax**

This benchmark does not explicitly use any special JavaScript features or syntax. It relies on standard JavaScript features and syntax for creating boolean values and comparing them directly using the `===` operator.

**Alternative Approaches**

Other approaches to checking boolean values in JavaScript include:

* Using `Boolean()` with parentheses, e.g., `Boolean(null)` vs. just `Boolean()`
* Using bitwise operators (AND or OR) on integers
* Using conditional statements (e.g., `if (value === true || value === false)`)
* Using custom helper functions to wrap boolean comparisons

Keep in mind that these alternative approaches may have their own trade-offs and performance characteristics, which might affect the overall benchmark result.

Related benchmarks:

Boolean constructor vs in Equality check in javascript (version: 0)

var bFalse = false; var sEmpty = ''; var sFilled = 'Foo'; var nZero = 0; var nOne = 1;

Comparing performance of: Boolean constructor test vs Equality check

Created: 3 years ago by: Registered User

Jump to the latest result

Boolean constructor test

Equality check

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):