Benchmark: first bench - MeasureThat.net

Tests:

assign
const values = { a: 1, b: 2 } values.c = 3
Object.assign
const values = { a: 1, b: 2 } Object.assign(values, { c: 3 })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
assign
Object.assign

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition JSON**

The provided Benchmark Definition JSON represents a basic benchmark template with no specific details about the script or HTML preparation code. It only includes:

* `Name`: The name of the benchmark, which is "first bench" in this case.
* `Description`: An optional description of the benchmark, but it's null here.
* `Script Preparation Code` and `Html Preparation Code`: These are empty strings, indicating that no specific preparation code is required for the script or HTML.

**Individual Test Cases**

There are two individual test cases:

1. **assign**: This test case measures the performance of assigning a new value to an object property (`values.c = 3`). The benchmark definition is:
   ```
const values = { a: 1, b: 2 }\r\nvalues.c = 3
```
   This code snippet creates an object `values` with two properties `a` and `b`, then assigns the value `3` to a new property `c`.

2. **Object.assign**: This test case measures the performance of using the `Object.assign()` method to assign values to an object (`Object.assign(values, { c: 3 })`). The benchmark definition is:
   ```
const values = { a: 1, b: 2 }\r\nObject.assign(values, { c: 3 })
```
   This code snippet creates an object `values` with two properties `a` and `b`, then uses `Object.assign()` to merge another object (`{ c: 3 }`) into the existing `values` object.

**Options Compared**

In this case, there are only two options being compared:

1. **Direct assignment**: The first test case (`assign`) uses direct property assignment (`values.c = 3`).
2. **Object.assign()**: The second test case (`Object.assign`) uses the `Object.assign()` method to assign values.

**Pros and Cons**

* **Direct Assignment**:
	+ Pros: Simple, straightforward, and potentially faster since it doesn't incur the overhead of a function call.
	+ Cons: May not be as efficient if the property name is long or contains special characters.
* **Object.assign()**:
	+ Pros: More flexible and safer (e.g., can handle nested objects), but may introduce additional overhead due to the function call and potential checks for properties existence.
	+ Cons: Can be slower than direct assignment, especially when dealing with large property names.

**Library**

In both test cases, a library is used:

1. `Object.assign()`: The built-in JavaScript `Object.assign()` method is used in the second test case.
2. No explicit library is mentioned for the first test case (`assign`), but the behavior can be considered similar to using `Object.assign()`.

**Special JS Feature/Syntax**

None are explicitly mentioned, so I won't elaborate on them.

**Other Alternatives**

There might be other alternatives for assigning values to objects, such as:

* Using `Object.defineProperty()` or `Object.defineProperties()`
* Using a library like Lodash's `assignIn()` function
* Creating a custom assignment function

However, these alternatives are not explicitly mentioned in the provided benchmark definition and test cases.

I hope this explanation helps!

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser/OS: Chrome 71 on Mac OS X 10.14.0

View result in a separate tab

Test name	Executions per second
assign	749623232.0 Ops/sec
Object.assign	4103366.0 Ops/sec

Related benchmarks:

first bench (version: 0)

Comparing performance of: assign vs Object.assign

Created: 5 years ago by: Registered User

Jump to the latest result

assign

Object.assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):