Benchmark: set vs array iteration 99

Script Preparation code:

var a = 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var b = new Set(a)

Tests:

array
a.includes(1000)
set
b.has(1000)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array
set

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
array	5005257.5 Ops/sec
set	11667229.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Based on the provided information, it appears that you are trying to determine the difference in execution speed between two JavaScript operations: `Array.prototype.includes()` and `Set.prototype.has()`. The code snippet you provided includes an array `a` and a set `b`, with the goal of benchmarking their performance.

To provide a helpful answer, I'll need some additional context or assumptions. However, based on the code snippet alone, here's a possible analysis:

**Array Search (`includes()`):**

* The `includes()` method iterates over the array to find the specified value (1000).
* In modern browsers, this operation has a relatively fast average time complexity of O(n), where n is the length of the array.
* However, due to caching and other optimizations, some modern engines might be able to perform `includes()` more efficiently.

**Set Search (`has()`):**

* The `has()` method checks if the set contains the specified value (1000).
* In general, checking for membership in a set is faster than searching an array because sets have better cache locality and can take advantage of more efficient data structures.
* Modern browsers like Chrome 121 have optimized implementations of `Set.prototype.has()`, which likely use techniques like hash collisions or caching to reduce the search time.

**Benchmarking Results:**

The provided benchmarking results show that:

1. The set operation (`has()`) is significantly faster than the array operation (`includes()`).
2. Both browsers (Chrome 121 on Desktop) have similar execution speeds for both operations, but with a larger margin of difference between them.

Keep in mind that these results are specific to the provided benchmarking conditions and might not be representative of all scenarios or edge cases.

To better answer your question, I'd need more context about:

* The expected performance characteristics for these operations.
* Any specific requirements or constraints you're working under (e.g., compatibility with older browsers).
* More detailed analysis of the code snippets provided.

Feel free to provide additional information, and I'll do my best to help!

Related benchmarks:

set vs array iteration 99 (version: 0)

Comparing performance of: array vs set

Created: 2 years ago by: Guest

Jump to the latest result

array

set

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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