Benchmark: Compare comparison with null or undefined

Compare comparison with null or undefined (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)`

Created: 6 years ago by: Registered User

Go to the latest result

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)

Historical Performance Data aggregated from 21 community runs

Desktop Results:

Chrome 21 runs

value != null

27.6M/s

value !== null

27.1M/s

value === null

27.0M/s

value == null

26.6M/s

value !== undefined

10.5M/s

value != undefined

10.3M/s

value === undefined

10.3M/s

_.isNil(value)

10.2M/s

!_.isNil(value)

10.2M/s

value == undefined

10.1M/s

value === null || value === undefined

7.9M/s

value !== null && value !== undefined

7.9M/s

Fastest: value != null (3.5x faster)

View exact numbers

✓ value != null: 27,558,090 ops/sec
• value !== null: 27,130,788 ops/sec
• value === null: 27,009,758 ops/sec
• value == null: 26,616,356 ops/sec
• value !== undefined: 10,457,872 ops/sec
• value != undefined: 10,348,250 ops/sec
• value === undefined: 10,261,336 ops/sec
• _.isNil(value): 10,195,274 ops/sec
• !_.isNil(value): 10,170,217 ops/sec
• value == undefined: 10,097,961 ops/sec
• value === null || value === undefined: 7,907,437 ops/sec
• value !== null && value !== undefined: 7,864,778 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

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)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/147.0.0.0

Browser/OS: Chrome 147 on Windows

View result in a separate tab

value != null

107.9M/s

value == undefined

107.2M/s

value == null

106.7M/s

value !== null

106.6M/s

value === null || value === undefined

106.3M/s

value !== undefined

106.2M/s

value !== null && value !== undefined

105.8M/s

value === undefined

104.1M/s

value != undefined

103.5M/s

value === null

102.2M/s

_.isNil(value)

101.8M/s

!_.isNil(value)

101.6M/s

View exact numbers

Test name	Executions per second
✓ value != null	107,939,616 Ops/sec
value == undefined	107,157,824 Ops/sec
value == null	106,736,216 Ops/sec
value !== null	106,631,448 Ops/sec
value === null \|\| value === undefined	106,270,456 Ops/sec
value !== undefined	106,162,312 Ops/sec
value !== null && value !== undefined	105,769,680 Ops/sec
value === undefined	104,109,952 Ops/sec
value != undefined	103,544,656 Ops/sec
value === null	102,172,848 Ops/sec
_.isNil(value)	101,821,208 Ops/sec
!_.isNil(value)	101,611,520 Ops/sec

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

LLMs can make mistakes. Check important info.

**What is being tested?**

On the provided JSON, multiple JavaScript microbenchmarks are defined to compare different conditions for `null` and `undefined`. The tests aim to determine which approach is faster in terms of executions per second.

The conditions being compared include:

* Equality operators (`==`, `===`) with `null` and `undefined`
* Inequality operators (`!=`, `!==`) with `null` and `undefined`
* Logical OR operator (`||`) with `null` and `undefined`
* Usage of the `isNil()` function from the Lodash library
* Negation operator (`!`) with `isNil()`

**Comparison of Equality Operators**

The tests compare the performance of using equality operators to check for `null` and `undefined`. The results show that:

* `value === null` is slower than `value === undefined`
* `value === undefined` is faster than `value !== undefined`

This suggests that checking for `undefined` is more efficient than checking for `null`.

**Comparison of Inequality Operators**

The tests compare the performance of using inequality operators to check for `null` and `undefined`. The results show that:

* `value !== null` is slower than `value !== undefined`
* `value !== undefined` is faster than `value === undefined`

This suggests that checking for `undefined` is more efficient than checking for `null`.

**Comparison of Logical OR Operator**

The tests compare the performance of using the logical OR operator (`||`) to combine a condition with `null` and `undefined`. The results show that:

* `value === null || value === undefined` is slower than `value !== null && value !== undefined`

This suggests that combining conditions using logical AND (`&&`) is more efficient than using logical OR (`||`).

**Comparison of Lodash's isNil() function**

The tests compare the performance of using Lodash's `isNil()` function to check for `null` and `undefined`. The results show that:

* `!isNil(value)` is slower than `value !== undefined`
* `isNil(value)` is faster than `value === null`

This suggests that checking for `null` using the `isNil()` function is more efficient than using equality operators.

**Comparison of Negation Operator**

The tests compare the performance of using the negation operator (`!`) with the `isNil()` function. The results show that:

* `!isNil(value)` is faster than `value !== undefined`
* `isNil(value)` is slower than `value === null`

This suggests that using the negation operator with `isNil()` can be more efficient, but it depends on the specific use case.

Overall, the tests suggest that checking for `undefined` is generally more efficient than checking for `null`, and combining conditions using logical AND (`&&`) is more efficient than using logical OR (`||`). Using Lodash's `isNil()` function can also be an efficient way to check for `null`.