Benchmark: JavaScript sfsdfsdf 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 obj = { "EnumID": 34435435, "ID": 43645657657, "ShortName": "asdsdsad", "ShortDescription": "sadsadasd", "DefaultOutputFormName": "", "StreamName": "dfdsfd", "SmallName": "dfgfdgdfgdfg", "Description": "vxcvxvxcv dfdfdf", "DDMForm": "dgdfgdfgdfg", "HasHelps": true, "NavigationTypeId": 4, "HasProtectedField": true, "Triggers": [], "Alias": [], "Sections": [], "onLoadTriggers": [], "CalculatedCommandBindings": {} }; const returnValue = {}; let value = {}; if (obj instanceof Array) { return obj.map((val) => { if (typeof val === 'object') { value = convertToCamelCaseKeys(val); } return value; }); } else { for (const key in obj) { if (_.has(obj, key)) { returnValue[key.charAt(0).toLowerCase() + key.slice(1)] = obj[key]; } } } return returnValue;
Using Object.assign
const obj = { "EnumID": 34435435, "ID": 43645657657, "ShortName": "asdsdsad", "ShortDescription": "sadsadasd", "DefaultOutputFormName": "", "StreamName": "dfdsfd", "SmallName": "dfgfdgdfgdfg", "Description": "vxcvxvxcv dfdfdf", "DDMForm": "dgdfgdfgdfg", "HasHelps": true, "NavigationTypeId": 4, "HasProtectedField": true, "Triggers": [], "Alias": [], "Sections": [], "onLoadTriggers": [], "CalculatedCommandBindings": {} }; const returnValue = {}; if (Array.isArray(obj)) { return obj.map((val) => { if (typeof val === 'object') { return convertToCamelCaseKeys(val); } return val; }); } else { Object.keys(obj).forEach((key) => { if (_.has(obj, key)) { returnValue[key.charAt(0).toLowerCase() + key.slice(1)] = obj[key]; } }); } return returnValue;

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 provided benchmark and explain what's being tested, the options compared, their pros and cons, and other considerations.

**Benchmark Definition**

The provided JSON represents a benchmark test suite. The main difference between the two benchmark definitions is the way they handle array-like objects (`obj`) with nested objects. There are two approaches:

1. **Using the spread operator**:
```javascript
if (Array.isArray(obj)) {
  return obj.map((val) => {
    if (typeof val === 'object') {
      value = convertToCamelCaseKeys(val);
    }
    return value;
  });
} else {
  // ...
}
```
2. **Using Object.assign**:
```javascript
if (Array.isArray(obj)) {
  return obj.map((val) => {
    if (typeof val === 'object') {
      return convertToCamelCaseKeys(val);
    }
    return val;
  });
} else {
  Object.keys(obj).forEach((key) => {
    if (_.has(obj, key)) {
      returnValue[key.charAt(0).toLowerCase() + key.slice(1)] = obj[key];
    }
  });
}
```
**Options Compared**

The two approaches differ in the following ways:

*   In the spread operator approach, the `map` function is used to transform each element of the array. If an element is an object, it's converted to camel case using the `convertToCamelCaseKeys` function.
*   In the Object.assign approach, the `Object.keys` method is used to get an array-like representation of the object's keys, and then a loop iterates over each key-value pair. The key is converted to camel case, and its value is assigned to the `returnValue` object.

**Pros and Cons**

*   **Spread operator approach:**
    *   Pros:
        *   More concise and expressive code
        *   Uses modern JavaScript features (e.g., arrow functions, `map`)
    *   Cons:
        *   May be less readable for developers unfamiliar with these features
        *   Requires the presence of a suitable value for `value` variable
*   **Object.assign approach:**
    *   Pros:
        *   More widely supported in older browsers and environments (e.g., Internet Explorer)
        *   Easier to understand for developers without experience with modern JavaScript features
    *   Cons:
        *   Requires a suitable object (`returnValue`) to store the results
        *   May be less concise than the spread operator approach

**Other Considerations**

*   **convertToCamelCaseKeys function:** This is not shown in the provided code snippet, but it's assumed to convert an object with camel case keys to an object with camel case keys. Its implementation and performance impact are not discussed here.
*   **Browser differences:** The benchmark results show significant differences between Chrome 114 on Windows (Desktop) for both approaches. This may indicate that these browser/OS combinations have specific optimizations or quirks affecting the execution of these benchmarks.

**Alternatives**

If you're looking for alternatives to the spread operator and Object.assign approaches, consider:

*   **Lodash's `mapKeys` function:** This function can convert an object with camel case keys to an object with underscore notation keys. It could be used as an alternative to `convertToCamelCaseKeys`.
*   **ES6 Promises:** If you're using modern browsers or environments, you might consider using Promises instead of callbacks for handling asynchronous operations.
*   **Async/Await syntax:** For more complex asynchronous operations, async/await can make your code easier to read and write.

Related benchmarks:

JavaScript sfsdfsdf 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):