Benchmark: Boolean vs double bang !!

Script Preparation code:

var newArr = [11298, 64188, false, '', -17539, -2718, -81300, -93173, 12150, -23314, -90890, 10472, 68323, null, 14756, 23838, 44324, 8742, -14019, 850, 75308, 56916, -9163, -5720, -74582, 14163, -38494, 5965, 61498, 96239, 22710, -74672, 65462, 5866, 95287, -99185, -87437, -65516, 87094, -24801, 44795, 82241, -58676, -88510, 33894, 92451, -65650, 89705, -40431, 15336, 34274, -68818, -58107, 59473, 54784, 15912, -51295, 98932, -70544, -61433, -80291, -3195, -27401, -89871, 32656, 79579, 47926, -69927, -76320, 62505, null, -33635, 36563, 84709, 73487, -1266, 64863, -86546, -4595, 33695, -18952, 4906, -14988, -90722, 28588, -53613, 58586, 72780, -57395, 91036, 66411, 82860, -93967, -90093, 83360, -62200, 6289, -54882, -40122, -65505, 30931, -93352, 30424, -12587, 1.8566900229637684, 1.3011419549756973, 1.1708070924467107, 1.1819141247478844, 1.4578638598859297, undefined, NaN, undefined, 1.1219243130494703, 1.698862057601821, 1.2357960424915777, 1.6060255866350979, 1.8577522621138371, 1.1832093514225788, 1.7426406496354048, 1.533257615040655, 1.5262907371593901, 1.1065375905007233, 1.716525097644193, 1.6130346286949768, 1.1618851436955837, 1.842052624586361, 1.3325571621599352, 1.2117505914206794, 1.5448256621289034, 1.9784677360157352, 1.453593375677712, 1.8737035178512615, 1.3963905343775227, 1.1844284040348567, 1.1752619028897677, 1.4586216763191184, 1.643308280549214, 1.9354515367855045, 1.7826635257999848, 1.3552860607477877, 1.8330370522617598, 1.6112899872390167, 1.6654639110922305, 1.0553428195648753, 1.2764309508299496, 1.479479693956518, 1.724839630514982, 1.376958088803886, 1.4095892542209163, 1.0915209200309886, 1.1283919063449177, 1.087726847164952, 1.6050053445118588, 1.184795455938699, 1.8095744228621569, 1.2577660608553072, 1.5751391585285301, 1.8566900229637684, -1.3011419549756973, -1.1708070924467107, -1.1819141247478844, -1.4578638598859297, -1.1219243130494703, 1.698862057601821, -1.2357960424915777, 1.6060255866350979, 1.8577522621138371, -1.1832093514225788, 1.7426406496354048, 1.533257615040655, 1.5262907371593901, -1.1065375905007233, 1.716525097644193, 1.6130346286949768, -1.1618851436955837, 1.842052624586361, -1.3325571621599352, -1.2117505914206794, 1.5448256621289034, 1.9784677360157352, -1.453593375677712, 1.8737035178512615, -1.3963905343775227, -1.1844284040348567, -1.1752619028897677, -1.4586216763191184, 1.643308280549214, 'apendix', 1.7826635257999848, -1.3552860607477877, 'eye', 1.6112899872390167, 1.6654639110922305, -1.0553428195648753, -1.2764309508299496, -1.479479693956518, 1.724839630514982, -1.376958088803886, -1.4095892542209163, -1.0915209200309886, -1.1283919063449177, -1.087726847164952, 1.6050053445118588, -1.184795455938699, 1.8095744228621569, -1.2577660608553072]

Tests:

Boolean
const a1 = newArr.map((v) => Boolean(v))
Double bang !!
const b1 = newArr.map((v) => !!v)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Boolean
Double bang !!

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 2 days ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark is defined in JSON format, which includes:

*   `Script Preparation Code`: This is a JavaScript snippet that initializes an array (`newArr`) with various values.
*   `Html Preparation Code`: This is empty, indicating that no HTML code needs to be prepared before running the benchmark.
*   `Benchmark Definitions`: These are two individual test cases:
    *   `"const a1 = newArr.map((v) => Boolean(v))"`: Tests the performance of converting an array element to a boolean value using the `Boolean()` function.
    *   `"const b1 = newArr.map((v) => !!v)"`: Tests the performance of converting an array element to a boolean value using the double-bang operator (`!!`).

**Individual Test Cases**

Each test case includes:

*   `Benchmark Definition`: The specific JavaScript code being tested.
*   `Test Name`: A descriptive name for each test case.

**Comparison**

The benchmark compares the performance of two approaches:

1.  `Boolean(v)`: This method creates a new boolean value based on the input value.
2.  `!!v`: This method uses the double-bang operator to convert the input value to a boolean value. The double-bang operator first converts the value to a number and then checks if it's zero. This approach is faster because it avoids creating an intermediate boolean object.

**Pros and Cons**

*   **Boolean(v)**:
    *   Pros: Clearer intent, better maintainability.
    *   Cons: Creates an intermediate boolean object, which can be slower due to memory allocation and garbage collection.
*   `!!v`:
    *   Pros: Faster, as it avoids creating an intermediate object.
    *   Cons: Less readable, and its behavior might not be immediately clear to developers.

In summary, the benchmark tests the performance of two different approaches to converting array elements to boolean values. The `!!v` approach is faster but less readable, while `Boolean(v)` creates a clearer intent but may be slower due to memory allocation.

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Boolean	25611.2 Ops/sec
Double bang !!	618485.9 Ops/sec

Related benchmarks:

Boolean vs double bang !! (version: 0)

Comparing performance of: Boolean vs Double bang !!

Created: 6 months ago by: Registered User

Jump to the latest result

Boolean

Double bang !!

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 2 days ago):