Benchmark: get or null test

Script Preparation code:

const test = {
  "myChannel": "channel"
}

function getChannelByProperty(name) {
  if(!test.hasOwnProperty(name)) {
    return null;
  }
  return test[name];
}

function getChannelOrNull(name) {
  return test[name] || null;
}

function getChannelDirectly(name) {
  return test[name];
}

Tests:

exists hasOwnProperty
getChannelByProperty("myChannel") === "channel"
exists orNull
getChannelOrNull("myChannel") === "channel"
exists directly
getChannelDirectly("myChannel") === "channel"
missing hasOwnProperty
getChannelByProperty("myChannel") == null
missing orNull
getChannelOrNull("myChannel") == null
missing directly
getChannelDirectly("myChannel") == null

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
exists hasOwnProperty
exists orNull
exists directly
missing hasOwnProperty
missing orNull
missing directly

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 is designed to test the performance of three different approaches for accessing properties in an object: `hasOwnProperty`, `in` (or `orNull`), and direct property access (`directly`). The benchmark measures how fast each approach can execute these operations.

**Properties Access Approaches**

1. **hasOwnProperty**: This method checks if the object has a property with the given name using the `.hasOwnProperty()` method. If the property exists, it returns `true`. If not, it returns `false`.
2. **in` (or `orNull`)**: The `in` operator (also known as "in" or "orNull") is used to check if a property with the given name exists in the object. It returns `true` if the property exists and `false` otherwise.
3. **Direct Property Access (`directly`)**: This approach directly accesses the property using the object's bracket notation (e.g., `test['myChannel']`).

**Pros and Cons of Each Approach**

1. **hasOwnProperty**:
	* Pros: Fast, efficient, and widely supported across browsers.
	* Cons: May be slower for large objects due to the need to check if the property exists before accessing it.
2. **in` (or `orNull`)**:
	* Pros: Faster than `hasOwnProperty` for large objects, as it doesn't require an additional check.
	* Cons: Less widely supported across browsers, and its behavior can be tricky to understand.
3. **Direct Property Access (`directly`)**:
	* Pros: Fastest approach, but may lead to errors if the property is not defined or if there are typos in the key.
	* Cons: Not as efficient for large objects due to the need to perform a lookup.

**Other Considerations**

The benchmark uses a simple test case with an object containing only one property. This might not accurately represent real-world scenarios, where objects often contain multiple properties and more complex data structures.

Additionally, the `in` operator's behavior can be different across browsers (e.g., Chrome returns `undefined` if the property is missing, while Firefox returns `false`). The benchmark doesn't account for these differences.

**Library Used**

There isn't a specific library mentioned in the benchmark definition or test cases. However, it appears to use built-in JavaScript features and object notation (`{}`).

**Special JS Features**

The benchmark uses the following special JS features:

1. **Arrow functions**: The `getChannelByProperty` and `getChannelOrNull` functions are written using arrow functions.
2. **Bracket notation**: Direct property access (`directly`) uses bracket notation (e.g., `test['myChannel']`).

**Alternatives**

Other alternatives for accessing properties in an object include:

1. **Object.keys()**: Returns an array of all property names in the object, which can be used to iterate over the properties.
2. **for...in** loop: Iterates over all enumerable properties in the object.
3. **Array.prototype.includes()` or `String.prototype.includes()`: Checks if a value is present in an array or string.

These alternatives might offer better performance or readability for specific use cases, but may require more code and complexity to implement.

Related benchmarks:

get or null test (version: 0)

Comparing performance of: exists hasOwnProperty vs exists orNull vs exists directly vs missing hasOwnProperty vs missing orNull vs missing directly

Created: 3 years ago by: Guest

Jump to the latest result

exists hasOwnProperty

exists orNull

exists directly

missing hasOwnProperty

missing orNull

missing directly

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):