Benchmark: ObjectVMap - MeasureThat.net

Script Preparation code:

var map = new Map();
var obj = {};

map.set('abcdefghij', '1fsadfdsfdsfdsfdsfsdfsdfsdfsdfsfvavsadfvsadfvsadvasdfsadfvsdfvasdfvs');
obj['abcdefghij'] = '1fsadfdsfdsfdsfdsfsdfsdfsdfsdfsfvavsadfvsadfvsadvasdfsadfvsdfvasdfvs';

var i = 0, count = 1000, a;

Tests:

MapGet
for (i = 0; i < count; i++) { a = map.get('abcdefghij'); }
ObjectGet
for (i = 0; i < count; i++) { a = obj['abcdefghij']; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
MapGet
ObjectGet

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36

Browser/OS: Chrome 91 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
MapGet	4722.6 Ops/sec
ObjectGet	5096.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is defined by two JSON objects:

1. **Script Preparation Code**: This code creates a new JavaScript object `map` and a new object `obj`. It then sets an entry in the `map` using the `set()` method, and sets a property on the `obj` using the same key-value pair.
2. **Html Preparation Code**: There is no HTML preparation code provided.

**Individual Test Cases**

The benchmark consists of two test cases:

1. **MapGet**: This test case uses the `get()` method to retrieve the value associated with a given key in the `map`. The loop iterates 1000 times, accessing the same entry.
2. **ObjectGet**: This test case uses property access (`obj['abcdefghij']`) to retrieve the value associated with the same key as in the MapGet test case. Again, the loop iterates 1000 times.

**Library: `Map`**

The `Map` object is a built-in JavaScript object that stores key-value pairs. The purpose of using a `Map` here is likely to compare its performance against a traditional object-based property access approach (e.g., `obj['abcdefghij']`).

**Pros and Cons of each approach:**

1. **`map.get('abcdefghij')`**:
	* Pros: Efficient lookup, potentially faster execution times due to the optimized implementation of the `get()` method.
	* Cons: May have additional overhead due to the creation of a new `Map` object, which can be slower than accessing an existing object directly.
2. **`obj['abcdefghij']`**:
	* Pros: No additional overhead; already has access to the desired data structure (an object).
	* Cons: May have slower execution times due to property access and potential string comparison.

**Other considerations:**

* The use of a specific key (`'abcdefghij'`) may be chosen for its uniqueness or for testing purposes.
* The value associated with this key is also carefully crafted to ensure efficient lookup in the `Map` test case.

**Alternative approaches:**

1. **Using an object property**: Instead of using a `Map`, you could access the same property directly on the `obj`.
2. **Using a different data structure**: Depending on the specific requirements, you might consider using other data structures like arrays or sets.
3. **Using native methods**: Some browsers provide native methods for working with maps, such as `get()` and `set()`. These might be more efficient than the JavaScript `Map` implementation.

Keep in mind that this benchmark is focused on comparing two specific approaches (using a `Map` versus accessing an object property). Other factors like cache behavior, data locality, or branch prediction might also influence performance.

Related benchmarks:

ObjectVMap (version: 0)

Comparing performance of: MapGet vs ObjectGet

Created: 3 years ago by: Guest

Jump to the latest result

MapGet

ObjectGet

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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