Benchmark: assign vs direct 2

Script Preparation code:

var data = {};

Tests:

direct
data.prop_1 = true; data.prop_2 = true;
assign
Object.assign(data, { prop_3: true }); Object.assign(data, { prop_4: true });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
direct
assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser/OS: Chrome 125 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
direct	14188138.0 Ops/sec
assign	4399730.0 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 provided benchmark and its options.

**Benchmark Definition**

The benchmark is defined by a JSON object with the following properties:

* `Name`: The name of the benchmark, which is "assign vs direct 2".
* `Description`: An empty string, indicating that there is no description for this benchmark.
* `Script Preparation Code`:
```javascript
var data = {};
```
This code initializes an empty object called `data`.

**Html Preparation Code**

There is no HTML preparation code provided.

The benchmark has two test cases:

1. **Direct**: The script assignment is done directly to the `data` object using dot notation (`data.prop_1 = true;` and `data.prop_2 = true;`).
2. **Assign**: The `Object.assign()` method is used to assign values to the `data` object.

**Options being compared**

The benchmark compares the performance of direct assignment vs. `Object.assign()` in two test cases: `prop_1` and `prop_2`.

**Pros and Cons of each approach**

* **Direct Assignment**
	+ Pros:
		- Simple and straightforward syntax.
		- Fast execution since it doesn't involve function calls or checks.
	+ Cons:
		- May require more manual memory management (e.g., avoiding prototype chaining).
		- Can lead to polluting the global scope if not used carefully.
* **Object.assign()**
	+ Pros:
		- More convenient and flexible syntax, as it allows assigning multiple properties at once.
		- Avoids polluting the global scope.
	+ Cons:
		- May be slower due to function call overhead or checks (depending on browser implementation).
		- Requires more memory allocation since it creates a new object.

**Library usage**

There is no explicit library mentioned in the benchmark definition. However, `Object.assign()` is a built-in JavaScript method that uses the ECMAScript 2015 (ES6) syntax.

**Special JS features/syntax**

The test cases use ES6-style syntax for `Object.assign()`. This suggests that the benchmark is intended to evaluate performance differences between direct assignment and `Object.assign()` in modern browsers, which support ES6 features.

**Other considerations**

* The benchmark uses a simple object (`data`) with two properties (`prop_1` and `prop_2`). Using larger objects or more complex data structures might affect the results.
* The test cases don't handle errors or exceptions. In a real-world scenario, you'd want to ensure that your code handles potential errors gracefully.

**Alternatives**

Other alternatives for achieving similar performance differences between direct assignment and `Object.assign()` include:

* Using native JavaScript methods like `PropertyOf()` (in older browsers) or `Set`/`Map` objects (for more complex data structures).
* Implementing a custom assignment function using callbacks or promises.
* Using third-party libraries that provide optimized assignment functions.

Keep in mind that the choice of alternative will depend on the specific use case, performance requirements, and browser support.

Related benchmarks:

assign vs direct 2 (version: 0)

Comparing performance of: direct vs assign

Created: one year ago by: Guest

Jump to the latest result

direct

assign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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