Benchmark: Includes v Has #2

Script Preparation code:

var a = []
for (var i = 1; i <= 10000; i++) {
   a.push(i);
}

var b = new Set(a)

Tests:

Includes
return a.includes(5000)
Has
return b.has(5000)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Includes
Has

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 JSON and explain what's being tested.

**Benchmark Definition**

The benchmark definition is a set of scripts that are executed to test the performance of two different JavaScript methods: `includes()` and `has()`. The `Script Preparation Code` section defines an array `a` with 10,000 elements, which is then converted into a Set object `b`.

**Comparison of Options**

The benchmark compares the performance of two approaches:

1. **Includes**: This method checks if an element exists in the array using the `includes()` function.
2. **Has**: This method uses the `has()` function on the Set object to check if an element exists.

**Pros and Cons of Each Approach**

* **Includes**:
	+ Pros: Simple, widely supported, and well-documented.
	+ Cons: May have a higher overhead due to array iteration.
* **Has** (on Set):
	+ Pros: Faster on average, as it uses a hash table for fast lookups.
	+ Cons: Less widely supported, as not all browsers implement `has()` on Sets.

**Library and Purpose**

In the benchmark preparation code, the `Set` object is used. A `Set` is a data structure in JavaScript that stores unique values, which can be used to improve lookup performance. The purpose of using a Set here is to demonstrate the difference in performance between the two methods when working with large datasets.

**Special JS Feature or Syntax**

The benchmark uses the `RawUAString` field to capture the User Agent string and other metadata from the browser's UA. This allows for the benchmark to identify specific browsers, devices, and platforms being tested. The use of `has()` on Sets is a modern JavaScript feature that may not be supported by older browsers.

**Other Alternatives**

There are alternative methods that could be used for similar purposes:

* For includes(), one could also consider using `Array.prototype.indexOf()`, which has similar performance characteristics to `includes()`.
* For Has (on Set), one could also use `Set.prototype.has()` instead, but as mentioned earlier, this is not supported by all browsers.

**Context and Considerations**

When creating a benchmark like this, it's essential to consider the following:

* Make sure the test cases are representative of real-world scenarios.
* Use a diverse set of browsers, devices, and platforms to ensure broad coverage.
* Optimize the benchmark code for performance and accuracy.
* Provide clear and concise instructions for users to prepare and run the benchmarks.

By understanding the specifics of this benchmark, developers can gain insights into the performance characteristics of JavaScript methods like `includes()` and `has()`, which can inform their own coding decisions and optimization strategies.

Related benchmarks:

Includes v Has #2 (version: 0)

Comparing performance of: Includes vs Has

Created: 3 years ago by: Guest

Jump to the latest result

Includes

Has

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):