Benchmark: JavaScript sdfsdfds performance1

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

Using the spread operator
const returnValue = {}; const obj = { SampleData: 'Hello world', MoreData: 'foo bar', SampleData1: 'Hello world', MoreData1: 'foo bar', SampleData2: 'Hello world', MoreData2: 'foo bar', SampleData3: 'Hello world', MoreData3: 'foo bar', SampleData4: 'Hello world', MoreData4: 'foo bar', SampleData5: 'Hello world', MoreData5: 'foo bar', SampleData6: 'Hello world', MoreData6: 'foo bar', SampleData7: 'Hello world', MoreData7: 'foo bar', SampleData8: 'Hello world', MoreData8: 'foo bar', SampleData9: 'Hello world', MoreData9: 'foo bar', SampleData0: 'Hello world', MoreData0: 'foo bar', }; for (const key in obj) { if (_.has(obj, key)) { returnValue[key.charAt(0).toLowerCase() + key.slice(1)] = obj[key]; } }
Using Object.assign
const returnValue = {}; const obj = { SampleData: 'Hello world', MoreData: 'foo bar', SampleData1: 'Hello world', MoreData1: 'foo bar', SampleData2: 'Hello world', MoreData2: 'foo bar', SampleData3: 'Hello world', MoreData3: 'foo bar', SampleData4: 'Hello world', MoreData4: 'foo bar', SampleData5: 'Hello world', MoreData5: 'foo bar', SampleData6: 'Hello world', MoreData6: 'foo bar', SampleData7: 'Hello world', MoreData7: 'foo bar', SampleData8: 'Hello world', MoreData8: 'foo bar', SampleData9: 'Hello world', MoreData9: 'foo bar', SampleData0: 'Hello world', MoreData0: 'foo bar', }; for (const key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { returnValue[key[0].toLowerCase() + key.slice(1)] = obj[key]; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using the spread operator
Using Object.assign

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 break down the benchmark and its test cases.

**Benchmark Definition**

The benchmark definition is a JSON object that provides metadata about the benchmark, including its name, description, script preparation code, and HTML preparation code. In this case, the benchmark is named "JavaScript performance" and it uses Lodash library.

**Test Cases**

There are two test cases:

1. **Using the spread operator**: This test case defines a JavaScript object `obj` with multiple properties and then iterates over its keys using a for...in loop. It uses the spread operator to create a new object `returnValue`. The benchmark measures the execution time of this code.
2. **Using Object.assign**: This test case is similar to the previous one, but it uses the `Object.assign` method instead of the spread operator to create a new object `returnValue`.

**Options Compared**

The two test cases compare the performance of using the spread operator versus `Object.assign`. Both methods are used to create a new object by iterating over an existing object's keys and assigning values to a new object.

**Pros and Cons**

1. **Using the spread operator**:
	* Pros: It is often considered more readable and concise than using `Object.assign`.
	* Cons: In older browsers that do not support the spread operator, it may be slower or not supported at all.
2. **Using Object.assign**:
	* Pros: It is widely supported in modern browsers and can be faster than the spread operator in some cases.
	* Cons: Some developers find it less readable than the spread operator.

**Library: Lodash**

Lodash is a popular JavaScript library that provides various utility functions, including `has` which is used in one of the benchmark test cases. The `has` function checks if an object has a specific property.

**Special JS Features or Syntax**

In this benchmark, there are no special features or syntaxes used, such as async/await, promises, or arrow functions.

**Other Considerations**

* The benchmark uses Chrome 114 browser and Windows operating system.
* The benchmark measures the execution time of each test case in executions per second.
* The benchmark results can be used to compare the performance of different JavaScript libraries and coding styles.

**Alternatives**

If you want to write similar benchmarks, you can use other testing frameworks like Jest or Mocha, or other benchmarking tools like Benchmark.js. You can also use online benchmarking platforms like JSPerf or MicroBenchmarks.

Related benchmarks:

JavaScript sdfsdfds performance1 (version: 0)

Comparing performance of: Using the spread operator vs Using Object.assign

Created: 2 years ago by: Guest

Jump to the latest result

Using the spread operator

Using Object.assign

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):