Benchmark: Object.values VS Object.keys.map 2

Script Preparation code:

function makeid() {
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

  for (var i = 0; i < 5; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

window.parentObj = {};

for (let i = 0; i < 100; i++) {
	window.parentObj[makeid()] = makeid();
}

Tests:

Object.values
const testArray = []; const obj = window.parentObj; Object.values(obj).forEach(v => { testArray.push(v); });
Object.keys.map
const testArray = []; const obj = window.parentObj; Object.keys(obj).map(k => obj[k]).forEach(v => { testArray.push(v); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.values
Object.keys.map

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.

**Overview**

The provided JSON represents two JavaScript microbenchmarks, each testing different approaches for iterating over object values and keys. The benchmark aims to compare the performance of `Object.values()` and `Object.keys().map()` in accessing object properties.

**Benchmark Definition**

The benchmark definition is a single JSON object containing metadata about the test case:

* `Name`: A descriptive name for the benchmark.
* `Description`: An empty string, indicating no specific description or purpose for this benchmark.
* `Script Preparation Code`: A JavaScript function `makeid()` that generates random strings to populate an object. This code is used to create a large object with 100 properties, each containing a unique value.
* `Html Preparation Code`: An empty string, indicating no HTML preparation is required.

**Individual Test Cases**

There are two individual test cases:

1. **Object.values**
	* The benchmark definition uses the `Object.values()` method to iterate over the object's values and push them into an array called `testArray`.
2. **Object.keys.map**
	* The benchmark definition uses the `Object.keys()` method to get an array of object keys, then applies the `map()` method to create a new array containing the corresponding object values. These values are also pushed into the `testArray`.

**Libraries and Special JS Features**

Neither of these test cases rely on any external libraries or special JavaScript features.

**Comparison of Approaches**

The benchmark compares two approaches for iterating over object properties:

1. **Object.values()**: This method returns an array of a given object's own enumerable property values. It iterates directly over the object's properties, without needing to access their keys.
2. **Object.keys().map()**: This approach uses `Object.keys()` to get an array of object keys and then applies the `map()` method to create a new array containing the corresponding object values.

**Pros and Cons**

**Object.values():**

Pros:

* Can be more efficient, as it avoids the overhead of using `map()` on key arrays.
* May have better performance for large objects with many properties.

Cons:

* Requires modern JavaScript engines that support this method ( introduced in ECMAScript 2015).
* May not work as expected if the object has inherited properties or is a proxy object.

**Object.keys().map():**

Pros:

* Works on older browsers and environments that do not support `Object.values()`.
* Can be useful for iterating over objects with many keys, as it allows you to access both the key and value in a single iteration.

Cons:

* May be less efficient due to the overhead of using `map()` on large arrays.
* Requires creating an intermediate array, which can consume memory.

**Other Alternatives**

If available, other alternatives could include:

* Using `for...in` or `for...of` loops to iterate over object properties.
* Utilizing libraries like Lodash or Ramda for more functional programming approaches.

However, these alternatives are not explicitly mentioned in the provided benchmark definition, and their inclusion may affect the test's outcome.

Related benchmarks:

Object.values VS Object.keys.map 2 (version: 0)

Comparing performance of: Object.values vs Object.keys.map

Created: 4 years ago by: Guest

Jump to the latest result

Object.values

Object.keys.map

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):