Benchmark: map get vs array.find #5

Script Preparation code:

var array = Array.from(Array(10000).keys());
var map = new Map([array.map(v => [v,v])]);

Tests:

Array.find
array.forEach((el)=>{ array.find(el2 => el2 === el); })
map get
array.forEach((el)=>{ map.get(el); })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.find
map get

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 dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The provided benchmark measures the performance difference between `array.forEach` and `map.get` methods in JavaScript, specifically when searching for an element in an array using these two approaches. The benchmark consists of a script preparation code that creates an array with 10,000 elements and a map from this array, allowing for efficient lookups.

**Options Compared**

The benchmark compares the performance of two options:

1. **Array.forEach**: This method executes a callback function once for each element in the array. In this case, it's used to search for an element using `array.find`.
2. **map.get**: The `get` method is part of the Map object and allows direct access to the value associated with a given key (in this case, an array index). This approach searches for an element in the map.

**Pros and Cons**

Here's a brief overview of the pros and cons of each approach:

* **Array.forEach**:
	+ Pros: Simple to implement and understand.
	+ Cons: May be slower than `map.get` due to the overhead of iterating over the array.
* **map.get**:
	+ Pros: Typically faster, as it avoids the iteration overhead and uses a hash table for lookups.
	+ Cons: Requires creating a map from the array initially, which can add extra memory usage.

**Library and Special Features**

The benchmark uses the `Array.from` method to create an array with 10,000 elements. No libraries or special features are required for this benchmark.

**Test Users Special JS Feature or Syntax**

This benchmark is independent of any specific JavaScript feature or syntax, making it accessible to a wide range of developers.

**Other Alternatives**

Alternative approaches to searching for an element in an array or map could include:

* Using `array.indexOf()` or `map.has()` instead of `array.find` and `map.get`, respectively.
* Implementing a custom lookup function using bitwise operations or other optimized algorithms.
* Using other data structures, like a Set or a binary search tree, which might offer better performance for large datasets.

Keep in mind that the choice of approach depends on the specific requirements and constraints of your project. MeasureThat.net's benchmark provides valuable insights into the relative performance of different methods, helping developers make informed decisions about their code optimization strategies.

Related benchmarks:

map get vs array.find #5 (version: 0)

Comparing performance of: Array.find vs map get

Created: 3 years ago by: Guest

Jump to the latest result

Array.find

map get

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):