Benchmark: Array length boolean check

Script Preparation code:

var array = new Array(1000).fill('')

Tests:

Numeric comparison
array.length > 0
Boolean comparison
!!array.length

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Numeric comparison
Boolean comparison

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**Benchmark Overview**

The `Array length boolean check` benchmark measures the performance of two different approaches to checking if an array is not empty:

1. `array.length > 0`
2. `!!array.length`

These two expressions are equivalent, but they have some differences in terms of optimization and browser behavior.

**Options Compared**

The two options being compared are:

1. `array.length > 0`: This uses a direct comparison to check if the array length is greater than 0.
2. `!!array.length`: This uses a double-bang operator (`!!`) to convert the boolean value of `array.length` to a boolean expression.

**Pros and Cons**

* `array.length > 0`:
	+ Pros: Simple, straightforward, and easy to understand.
	+ Cons: May not be optimized for performance in some browsers.
* `!!array.length`:
	+ Pros: Can lead to better optimization in certain browsers (e.g., Chrome) due to the double-bang operator's behavior.
	+ Cons: Less intuitive and may require additional explanation.

**Library and Special JavaScript Features**

There is no library being used in this benchmark. However, it does use a special JavaScript feature: the double-bang operator (`!!`). This operator is a shorthand way of converting a value to a boolean expression, where `true` becomes `1` and `false` becomes `0`. This can be useful in certain situations, but its behavior can be non-intuitive and may not work as expected in all browsers.

**Other Considerations**

* The benchmark uses a fixed array size of 1000 elements filled with empty strings.
* The test cases are designed to measure the performance difference between the two expressions on an empty array.

**Alternatives**

If you're looking for alternative approaches, here are some options:

1. Use `array.some()` or `array.every()` instead of direct comparisons.
2. Consider using a library like Lodash or Ramda for more advanced array operations.
3. Experiment with different array sizes and fill patterns to see how it affects performance.

Keep in mind that these alternatives may not be directly comparable to the original benchmark, as they may introduce additional variables or complexities that aren't accounted for here.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser/OS: Chrome 117 on Linux

View result in a separate tab

Test name	Executions per second
Numeric comparison	2345977.8 Ops/sec
Boolean comparison	2350120.2 Ops/sec

Related benchmarks:

Array length boolean check (version: 0)

Measures and compares the performance of array.length > 0 and !!!array.length

Comparing performance of: Numeric comparison vs Boolean comparison

Created: one year ago by: Guest

Jump to the latest result

Numeric comparison

Boolean comparison

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):