Benchmark: Map vs Object creation 2

Script Preparation code:

var i = 0, count = 1000000, a;

Tests:

Map creation
for (i = 0; i < count; i++) { const test = new Map(); }
Obj creation
for (i = 0; i < count; i++) { const test = {}; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map creation
Obj creation

Fastest: N/A

Slowest: N/A

Latest run results:

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

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

**What is tested?**

The benchmark tests two different approaches for creating objects in JavaScript: using `Map` and using plain objects (`{}`). The test compares the performance of these two approaches.

**Options compared**

There are only two options being compared:

1. **Map creation**: Creating a new object using the `Map` constructor.
2. **Object creation**: Creating a new object using the `{}` syntax (i.e., an empty object literal).

**Pros and Cons**

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

* **Map creation**
	+ Pros: Maps are designed to store key-value pairs, which can be useful in certain scenarios. They also provide some built-in methods for iterating over their contents.
	+ Cons: In this benchmark, using `Map` is likely slower than using plain objects due to the overhead of creating a new map object and initializing its properties.
* **Object creation**
	+ Pros: Plain objects are lightweight and easy to create. They're also widely supported across browsers and platforms.
	+ Cons: Plain objects don't provide any built-in methods for iterating over their contents, which can make them less convenient in some cases.

**Library and its purpose**

In this benchmark, the `Map` library is not actually being used explicitly. Instead, the `Map` constructor is being used to create a new object that behaves like a map (i.e., an object with key-value pairs). This is a built-in JavaScript feature that was introduced in ECMAScript 2015.

**Special JS features or syntax**

In this benchmark, no special JavaScript features or syntax are explicitly being tested. However, it's worth noting that the use of `Map` as a lightweight object alternative is a relatively new feature in JavaScript, and its performance characteristics may vary depending on the browser and platform being used.

**Other alternatives**

If you were to rewrite this benchmark using other approaches for creating objects, some possibilities could include:

* Using the `Object.create()` method or the `Object.assign()` method to create new objects.
* Using a library like Lodash's `assignIn` function to create new objects.
* Using a different data structure altogether, such as an array of key-value pairs.

However, it's worth noting that these alternatives may not provide significant performance benefits over plain object creation in this particular benchmark.

Related benchmarks:

Map vs Object creation 2 (version: 0)

Lookup of map vs object

Comparing performance of: Map creation vs Obj creation

Created: 4 years ago by: Guest

Jump to the latest result

Map creation

Obj creation

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):