Benchmark: Object.values vs Reduce (largeObj)

Script Preparation code:

window.largeObj = {};
for(i=0; i<1000000; i++){window.largeObj[i.toString()] = i}

Tests:

Object.values
return Object.values(window.largeObj);
Keys, Reduce
return Object.keys(window.largeObj).reduce((prev, key) => { prev.push(window.largeObj[key]); return prev; },[]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.values
Keys, Reduce

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided JSON benchmark definition and test cases.

**Benchmark Definition**

The benchmark defines two test cases: `Object.values` and `Keys, Reduce`. Both tests are designed to measure the performance of different approaches to accessing data within an object.

**Options Compared**

1. **Object.keys() + Array.prototype.push()**: This approach uses the `Object.keys()` method to get an array of keys from the object, and then uses the `Array.prototype.push()` method to add values to the array.
2. **Object.values()**: This approach directly returns an array of values from the object without explicitly accessing keys.

**Pros and Cons**

* **Object.keys() + Array.prototype.push()**
	+ Pros: Can be more efficient for objects with a large number of keys, as it avoids creating an array of keys.
	+ Cons: Requires two separate operations (getting keys and pushing values), which can lead to overhead due to function call and parameter passing.
* **Object.values()**
	+ Pros: Directly returns the desired data, eliminating the need for additional processing or array manipulation.
	+ Cons: May be less efficient than the first approach for objects with a large number of keys.

**Library Usage**

The benchmark uses the `window.largeObj` variable to represent an object with 1 million properties. This object is created and populated in the "Script Preparation Code" section of the benchmark definition.

**Special JavaScript Feature or Syntax**

There are no special features or syntax mentioned in this benchmark. Both approaches use standard JavaScript methods and constructs.

**Other Alternatives**

For this specific benchmark, the alternatives would be other methods to access values from an object:

* Using `for...in` loop instead of `Object.keys()` and array manipulation.
* Utilizing a library like Lodash or Ramda for data processing.
* Employing a different approach, such as using a Map or Set data structure.

However, since the benchmark is specifically designed to compare two approaches (Object.keys() + Array.prototype.push() vs Object.values()), these alternatives are not relevant in this context.

Related benchmarks:

Object.values vs Reduce (largeObj) (version: 0)

Comparing performance of: Object.values vs Keys, Reduce

Created: 6 years ago by: Guest

Jump to the latest result

Object.values

Keys, Reduce

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):