Benchmark: Object Direct Guard Arg Vs Global

Script Preparation code:

var response = {
  data: {
    property: "value",
  },
};

Tests:

Arg Guard
function argGuard(resp) { return resp && resp.data && resp.data.property; } argGuard(response);
Global Guard
function globalGuard() { return response && response.data && response.data.property; } globalGuard();
Global Direct
function globalDirect() { return response.data.property; } globalDirect();
Arg Direct
function argDirect(resp) { return resp.data.property; } argDirect(response);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Arg Guard
Global Guard
Global Direct
Arg Direct

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.

The provided JSON represents a JavaScript benchmark test case on the MeasureThat.net website. The goal of this benchmark is to compare the performance of different approaches for accessing properties in an object.

**Benchmark Definition**

The benchmark definition is the script that is used to create and run the benchmark. In this case, there are four benchmark definitions:

1. `argGuard(resp)`: This function takes an object as an argument and returns a boolean value indicating whether the object has certain properties. It uses the "guard" pattern, which involves checking if the object exists before trying to access its properties.
2. `globalGuard()`: This function checks if the `response` object exists and has certain properties without taking any arguments.
3. `globalDirect(response.data.property)`: This function directly accesses the `property` property of the `data` object within the `response` object.
4. `argDirect(resp.data.property)`: Similar to the previous one, but takes an object as an argument.

**Options being compared**

The benchmark is comparing the performance of these four approaches:

* Using a guard pattern (`argGuard`) vs. not using a guard pattern (`globalGuard`)
* Directly accessing properties (`globalDirect`) vs. accessing properties through an object's data property (`argDirect`)

**Pros and Cons**

Here are some pros and cons of each approach:

1. `argGuard(resp)`:
	* Pros: Provides better error handling and safety, as it checks if the object exists before trying to access its properties.
	* Cons: May introduce additional overhead due to the function call and check.
2. `globalGuard()`:
	* Pros: Simplifies code and eliminates the need for explicit checks.
	* Cons: May lead to null pointer exceptions or undefined behavior if the object is missing or has unexpected properties.
3. `globalDirect(response.data.property)`:
	* Pros: Fastest approach, as it directly accesses the property without any overhead.
	* Cons: Lacks error handling and safety features, making it more prone to issues.
4. `argDirect(resp.data.property)`:
	* Pros: Combines the benefits of both approaches, providing better error handling while still being relatively fast.
	* Cons: May introduce additional overhead due to the function call.

**Library usage**

There is no explicit library mentioned in the benchmark definition or the provided test cases. However, it's likely that MeasureThat.net is using a JavaScript runtime environment (e.g., V8) under the hood to execute the benchmarks.

**Special JS feature or syntax**

The use of "guard" patterns (`argGuard` and `globalGuard`) is an example of a common JavaScript idiom for providing better error handling and safety in function calls. This pattern involves checking if an object exists before trying to access its properties, which helps prevent null pointer exceptions.

**Alternatives**

Other approaches for accessing properties in objects might include:

* Using the optional chaining operator (`?.`) (introduced in ECMAScript 2020): `response?.data?.property`
* Using a more functional programming style with immutability and pure functions
* Avoiding direct property access altogether and using a different data structure or abstraction layer

These alternatives may offer better performance, safety, or expressiveness depending on the specific use case. However, they might also introduce additional complexity or trade-offs in terms of readability, maintainability, or compatibility with older browsers.

Related benchmarks:

Object Direct Guard Arg Vs Global (version: 0)

Comparing performance of: Arg Guard vs Global Guard vs Global Direct vs Arg Direct

Created: 7 years ago by: Guest

Jump to the latest result

Arg Guard

Global Guard

Global Direct

Arg Direct

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):