Benchmark: conditional object creation vs let

Tests:

conditional create
if (typeof Obj !== "object") { var Obj = { "1": "one"}; }
let create
let Obj = { "1": "one"};

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
conditional create
let create

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

let create

1333.3M/s

conditional create

1315.0M/s

View exact numbers

Test name	Executions per second
✓ let create	1,333,260,288 Ops/sec
conditional create	1,314,975,616 Ops/sec

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 its test cases.

**Benchmark Overview**

The benchmark measures the performance difference between two approaches to creating objects in JavaScript: using a conditional statement with `typeof` to check if an object is already created, and using the `let` keyword to declare variables.

**Test Cases**

There are only two test cases:

1. **Conditional Object Creation**: The benchmark definition uses an `if-else` statement to create an object:
```javascript
if (typeof Obj !== "object") {
  var Obj = { "1": "one" };
}
```
This code checks if the variable `Obj` is not already an object using the `typeof` operator. If it's not, then it creates a new object with the specified properties.

2. **Let Variable Declaration**: The second test case uses the `let` keyword to declare a variable and create an object:
```javascript
let Obj = { "1": "one" };
```
This code declares a new variable `Obj` and assigns it an object with the specified properties. Note that this approach does not check if the variable already exists; instead, it simply re-declares it.

**Comparison of Approaches**

The two approaches differ in their behavior:

* **Conditional Object Creation**: This approach checks if an object is already created before declaring a new one. If the object already exists, it will reuse its existing properties.
* **Let Variable Declaration**: This approach always declares a new variable and creates a new object, regardless of whether the variable already exists.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Conditional Object Creation**:
	+ Pros:
		- Reuses existing object properties if the variable already exists.
		- May be faster in some cases since it avoids re-declaring a new variable.
	+ Cons:
		- Can lead to unexpected behavior if the variable is not properly initialized.
		- May have performance implications due to the conditional check.
* **Let Variable Declaration**:
	+ Pros:
		- Easy to read and understand, as it explicitly declares a new variable.
		- Does not require any special checks or considerations.
	+ Cons:
		- Always re-declares the variable, which may lead to performance issues if the variable is large or complex.

**Library Considerations**

In this benchmark, there is no specific library mentioned. However, it's worth noting that some libraries (e.g., Lodash) provide utility functions for object creation and manipulation, such as `lodash.object.create()`.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax mentioned in this benchmark. The code uses basic JavaScript syntax and does not include any advanced features like async/await, promises, or closures.

**Alternative Approaches**

Other alternatives to these approaches could be:

* Using the `Object.create()` method to create a new object.
* Using a class declaration to define an object (e.g., using `class MyClass { ... }`).
* Using a library like Lodash's `_.create()` function to create a new object.

Keep in mind that each approach has its pros and cons, and the best choice depends on the specific use case and performance requirements.

conditional object creation vs let (version: 0)

Comparing performance of: `conditional create vs let create`

Created: 2 years ago by: Guest

Go to the latest result

conditional create

let create

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

conditional object creation vs let (version: 0)

Comparing performance of: conditional create vs let create

Created: 2 years ago by: Guest

Go to the latest result

conditional create

let create

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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