Benchmark: mat get vs has2 - MeasureThat.net

Script Preparation code:

var m = new Map();
m.set(1,"toto");
for(let k = 4;k<1000;k++){
 m.set(k*2,"xxx");
}

Tests:

with get
let res = m.get(1) !== undefined;
with has
let res = m.has(1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
with get
with has

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

**Benchmark Overview**

The benchmark measures the performance difference between two methods in JavaScript: `get` and `has` for working with `Map` objects.

**Script Preparation Code**

The script preparation code creates a new `Map` object, sets an initial key-value pair, and then uses a loop to set multiple more key-value pairs:
```javascript
var m = new Map();
m.set(1, "toto");
for (let k = 4; k < 1000; k++) {
  m.set(k * 2, "xxx");
}
```
This script creates a large dataset of approximately 999 entries.

**Html Preparation Code**

There is no HTML preparation code provided, which means that the benchmark only runs in a JavaScript environment (e.g., web browser or Node.js).

**Test Cases**

There are two test cases:

1. **"with get"`**: This test case checks if the `get` method of the `Map` object returns `undefined` when searching for a key that doesn't exist.
2. **"with has"`**: This test case checks if the `has` method of the `Map` object returns a boolean value indicating whether a key exists in the map.

**Library**

The benchmark uses the built-in JavaScript `Map` object, which is a data structure that stores key-value pairs. The `get` and `has` methods are part of this object.

**Special JS Feature/ Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Pros and Cons of Approaches**

The performance difference between using `get` and `has` for working with `Map` objects is likely due to the following factors:

* **`get` method**: Returns the value associated with a key if it exists, or returns `undefined` if it doesn't. This involves a single lookup in the map.
* **`has` method**: Returns a boolean value indicating whether a key exists in the map. This involves a single check of the map's internal data structure.

The performance difference between these two methods may depend on the specific use case and implementation details of the `Map` object. However, in general:

* `get` is likely to be faster when used with large datasets because it avoids unnecessary checks.
* `has` may be faster for small datasets or when exact matches are not critical.

**Other Alternatives**

If you need to measure performance differences between other methods for working with `Map` objects (e.g., using `keys()`, `values()`, or `forEach()`), you can modify the benchmark script and test cases accordingly.

Related benchmarks:

mat get vs has2 (version: 0)

Comparing performance of: with get vs with has

Created: 4 years ago by: Guest

Jump to the latest result

with get

with has

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):