Benchmark: length vs !! - MeasureThat.net

Tests:

length
let objects = ['sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf']; for (let i = 0; i < 1000; i++) { return objects.length > 0; }
!!
let objects = ['sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf','sdfsdf']; for (let i = 0; i < 1000; i++) { return !!objects.length; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
length
!!

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its options.

**What is being tested?**

The test measures the performance difference between two approaches:

1. **Direct length comparison**: `objects.length > 0`
2. **Using the double-tilde operator (`!!`)**: `!!objects.length`

In both cases, a loop is executed 1000 times to check if an array `objects` has at least one element.

**Options compared**

The two options being tested are:

* Direct comparison using `.length > 0`
* Using the double-tilde operator (`!!`) to negate the result of `objects.length`

**Pros and Cons of each approach:**

1. **Direct length comparison**:
	* Pros:
		+ Simple and straightforward.
		+ Does not introduce any additional operations or overhead.
	* Cons:
		+ May be slower due to the implicit conversion to a boolean value.
2. **Using the double-tilde operator (`!!`)**:
	* Pros:
		+ Can be faster because it allows for a single operation ( negation) rather than two separate operations (conversion and comparison).
	* Cons:
		+ Introduces an additional operation that may slow down the test.
		+ May not be as readable or maintainable due to its unconventional use.

**Library usage**

There is no apparent library being used in this benchmark. The code only includes JavaScript built-in functions and variables.

**Special JS feature/syntax**

The double-tilde operator (`!!`) is a special syntax that negates its operand. It's not a widely used or well-known pattern, but it can be useful in certain situations where you need to convert a value to a boolean quickly.

**Other alternatives**

If the benchmarker wants to explore alternative approaches, they could consider:

* Using `Boolean(objects.length)`: This is similar to the direct comparison approach but uses a more explicit Boolean conversion.
* Using a library like `lodash` or `Ramda` which provide optimized functions for array manipulation and conditional checks.
* Experimenting with other JavaScript engines or versions to see if the results differ.

Keep in mind that the choice of approach ultimately depends on the specific requirements and constraints of the benchmark.

Related benchmarks:

length vs !! (version: 0)

Comparing performance of: length vs !!

Created: 9 years ago by: Guest

Jump to the latest result

length

!!

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):