Benchmark: Adding props to object

Tests:

With null
for (let f = 0; f < 1000000; f++) { const obj = {a: 5, b: null}; obj.b = 6; }
Without null
for (let f = 0; f < 1000000; f++) { const obj = {a: 5}; obj.b = 6; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
With null
Without null

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 dive into the world of JavaScript microbenchmarks and explore what's being tested on MeasureThat.net.

**Benchmark Overview**

The benchmark measures how long it takes to add properties to an object using two different approaches:

1. With null: `const obj = {a: 5, b: null}; obj.b = 6;`
2. Without null: `const obj = {a: 5}; obj.b = 6;`

**Options Compared**

The benchmark compares the performance of these two approaches on a single object assignment operation.

**Pros and Cons of Each Approach**

1. **With null**:
	* Pros:
		+ The code is more concise, as it only creates a single object with the desired properties.
	* Cons:
		+ Null can be used to create an empty property, which might lead to unexpected behavior if not handled properly.
2. **Without null**:
	* Pros:
		+ Avoids using null, making the code more predictable and easier to reason about.
	* Cons:
		+ Requires creating a separate object with the desired properties, which can be slightly slower.

**Library and Special JS Features**

None of the provided benchmark definitions use any external libraries. There are no special JavaScript features or syntax mentioned in the benchmark definitions either.

**Other Alternatives**

To further optimize this benchmark, alternative approaches could be explored:

1. **Using Object.create()**: Instead of creating an object with a single property and then assigning another value to it, you can create an object with multiple properties using `Object.create()` method. This might provide a performance boost.
```javascript
const obj = Object.create(null);
obj.a = 5;
obj.b = 6;
```
2. **Using literals**: You could use literal syntax to create objects with multiple properties in a single statement:
```javascript
const obj = {a: 5, b: 6};
```
However, these alternatives might not be supported by older browsers.

**Benchmark Preparation Code and HTML Preparation Code**

The benchmark preparation code is empty, which means the test cases are self-contained. The HTML preparation code is also empty, indicating that no additional HTML or DOM manipulation is required for this benchmark.

In summary, the MeasureThat.net benchmark measures the performance difference between adding a property to an object with null (proceeding directly) and without null (requiring explicit property creation). While there are pros and cons to each approach, neither uses external libraries or special JavaScript features.

Related benchmarks:

Adding props to object (version: 0)

Comparing performance of: With null vs Without null

Created: 9 years ago by: Guest

Jump to the latest result

With null

Without null

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):