Benchmark: Compare comparison with null or undefined (updated)

Compare comparison with null or undefined (updated) (version: 0)

Comparing performance of: value == null vs value == undefined vs value === null vs value === undefined vs value === null || value === undefined vs _.isNil(value) vs value != null vs value != undefined vs value !== null vs value !== undefined vs value !== null && value !== undefined vs !_.isNil(value) vs !value

Created: 2 years ago by: Guest

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HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js"></script>

Script Preparation code:

var value = { a: 123 }

Tests:

value == null
value == null
value == undefined
value == undefined
value === null
value === null
value === undefined
value === undefined
value === null || value === undefined
value === null || value === undefined
_.isNil(value)
_.isNil(value)
value != null
value != null
value != undefined
value != undefined
value !== null
value !== null
value !== undefined
value !== undefined
value !== null && value !== undefined
value !== null && value !== undefined
!_.isNil(value)
!_.isNil(value)
!value
!value

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
value == null
value == undefined
value === null
value === undefined
value === null \|\| value === undefined
_.isNil(value)
value != null
value != undefined
value !== null
value !== undefined
value !== null && value !== undefined
!_.isNil(value)
!value

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test case on the MeasureThat.net website. The benchmark compares different ways to check if a variable is either null or undefined.

**What's being tested?**

The benchmark tests various ways to express and compare null/undefined values in JavaScript:

1. Equality operators (`==`, `===`): Compare the value of `value` with null and undefined.
2. Logical OR operator (`||`): Checks if `value` is either null or undefined.
3. Lodash library functions (`_.isNil`, `!_.isNil`): Uses a third-party library to check for null/undefined values.

**Options compared**

The benchmark compares the following options:

1. Equality operators:
	* `value == null`
	* `value === null`
	* `value == undefined`
	* `value === undefined`
2. Logical OR operator:
	* `value || null`
	* `value || undefined`
3. Lodash library functions:
	* `_.isNil(value)`
	* `!_.isNil(value)`

**Results**

The benchmark results show the execution time for each option in milliseconds, with the fastest option being reported as the "winner".

**Implications and recommendations**

Based on the results, it appears that using equality operators (`===`) is generally faster than using logical OR operator (`||`). However, when considering robustness and safety, using `_.isNil` or `!_.isNil` from Lodash library might be a better choice.

If you need to perform this check in your own code, consider the following:

* Use equality operators (`===`) for simple checks.
* Consider using Lodash library functions (`_.isNil`, `!_.isNil`) for more robust and safe checks.
* Be aware that some browsers may have performance issues with certain operator combinations.

Keep in mind that this benchmark is specific to JavaScript and may not be directly applicable to other programming languages or scenarios.

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