Benchmark: mapvsobj - MeasureThat.net

Tests:

Map
let map = new Map(); map.set('name', 'ishtmeet') map.set('name', 'ish') let a = map.get('n') let b = map.get('name')
Object
let map = {} map['name'] = 'ishtmeet' map['name'] = 'ish' let a = map['n'] let b = map['name']

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map
Object

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36 Edg/116.0.1938.76

Browser/OS: Chrome 116 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Map	11756064.0 Ops/sec
Object	1584573952.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into explaining the JavaScript microbenchmark on MeasureThat.net.

**Benchmark Definition**

The benchmark is defined in JSON format, which contains information about the test case. The provided JSON defines two benchmarks: "Map" and "Object". However, there is no detailed description or script preparation code provided for each benchmark.

Assuming the benchmarks are testing the performance of JavaScript objects ( Maps and Objects) and key-value pairs, we can infer their purpose:

* **Benchmark "Map"**: Tests the performance of a JavaScript Map data structure when setting values, retrieving values using the `get()` method, and accessing values by key.
* **Benchmark "Object"**: Tests the performance of a JavaScript Object when setting properties, retrieving values using bracket notation (`map['name']`), and accessing values by property name.

**Comparison Options**

The benchmarks compare different approaches to accessing and manipulating data in these data structures:

1. **Map**
	* `let map = new Map(); // Create a new Map`
	* `map.set('name', 'ishtmeet'); // Set value using set() method`
	* `map.get('n'); // Retrieve value using get() method with key 'n' (non-existent)`
	* `map.get('name'); // Retrieve value using get() method with existing key 'name'`

2. **Object**
	* `let map = {}; // Create an empty Object`
	* `map['name'] =  'ishtmeet'; // Set property using bracket notation`
	* `map['n']; // Retrieve value using bracket notation with non-existent key 'n' (returns undefined)`
	* `map['name']; // Retrieve value using bracket notation with existing key 'name'`

**Pros and Cons of Each Approach**

1. **Map**
	* Pros:
		+ Efficiently stores key-value pairs.
		+ Provides fast lookup, insertion, and deletion operations.
	* Cons:
		+ May have slower performance due to the need for hash calculations.
2. **Object**
	* Pros:
		+ Wide support in JavaScript, as it is a fundamental data structure.
		+ Often preferred when working with existing codebases.
	* Cons:
		+ Can be slower than Map due to the overhead of property lookups and assignments.

**Library Usage**

In this benchmark, no specific libraries are used. The `Map` implementation in JavaScript is built-in and provides an efficient data structure for storing key-value pairs.

**Special JS Feature/Syntax (None)**

There are no special features or syntaxes mentioned in the provided benchmarking code.

**Alternatives**

Other alternatives to testing object performance include:

1. **Array**: Using arrays instead of objects can provide different results, especially when dealing with sparse data.
2. **WeakMap**: A WeakMap is a specialized Map implementation that only stores weak references to keys, which can be useful in certain scenarios.
3. **Destructuring assignment**: Using destructuring assignment (e.g., `const [a, b] = map`) instead of direct property access or bracket notation.

Keep in mind that the choice of alternative data structures and testing approaches depends on the specific requirements of your project or benchmarking goals.

Related benchmarks:

mapvsobj (version: 0)

Comparing performance of: Map vs Object

Created: one year ago by: Guest

Jump to the latest result

Map

Object

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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