Benchmark: [Object.entries after] Reduce vs Looping vs Ifs vs Destructuring

Script Preparation code:

var input = { foo: 'lorem', bar: 'ipsum', baz: null }
var reduce = (itemsArray, callback, seed) => {
  let accumulator = seed;
  for (let i = 0; i < itemsArray.length; i += 1) {
    accumulator = callback(accumulator, itemsArray[i], i);
  }
  return accumulator;
};

Tests:

Reduce
const keys = ['foo', 'bar', 'baz']; const setProperty = (acc, key, value) => value ? (acc[key] = value) && acc : acc; const result = keys.reduce((acc, key) => setProperty(acc, key, input[key]), {}); Object.entries(result).map( ([key, value]) => value ? `data-analytics-view-custom-analytics-${key}="${value}"` : '', )
Looping
const keys = ['foo', 'bar', 'baz']; const setProperty = (acc, key, value) => value ? (acc[key] = value) && acc : acc; const result = reduce( keys, (acc, key) => setProperty(acc, key, input[key]), {} ); Object.entries(result).map( ([key, value]) => value ? `data-analytics-view-custom-analytics-${key}="${value}"` : '', )
Ifs
const { foo, bar, baz } = input; const result = {}; if (foo) { result.foo = foo; } if (bar) { result.bar = bar; } if (baz) { result.baz = baz; } Object.entries(result).map( ([key, value]) => value ? `data-analytics-view-custom-analytics-${key}="${value}"` : '', )
Destructuring
const { foo, bar, baz } = input; const result = { foo, bar, baz }; Object.entries(result).map( ([key, value]) => value ? `data-analytics-view-custom-analytics-${key}="${value}"` : '', )

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reduce
Looping
Ifs
Destructuring

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 benchmark and explain what is being tested, along with the pros and cons of each approach.

**Benchmark Definition**

The benchmark measures the performance of four different methods to process an object:

1. **Reduce**: Using the `reduce()` method to iterate over an array of keys and update a result object.
2. **Looping**: Iterating over an array of keys using a traditional for loop.
3. **Ifs**: Using conditional statements (`if-else`) to check if each key has a value in the input object and update the result accordingly.
4. **Destructuring**: Using destructuring assignment to extract values from the input object and assign them to a new object.

**Options Comparison**

Here's a brief overview of each approach, their pros and cons:

1. **Reduce**
	* Pros: Efficient use of array iteration, concise code.
	* Cons: May be less readable for those unfamiliar with this method.
2. **Looping**
	* Pros: Easy to understand, no special knowledge required.
	* Cons: More verbose than other methods, potential performance overhead due to loop overhead.
3. **Ifs**
	* Pros: Easy to understand, no special knowledge required.
	* Cons: Verbose code, may lead to performance issues if not optimized properly.
4. **Destructuring**
	* Pros: Concise and readable code, leverages modern JavaScript features.
	* Cons: Requires familiarity with destructuring syntax, may be slower due to object creation overhead.

**Library**

The `reduce()` method is a built-in JavaScript function that iterates over an array and applies a callback function to each element. In this benchmark, the `reduce()` method is used as a wrapper around the `setProperty` function to simplify the code.

**Special JS Feature/Syntax**

The destructuring assignment syntax (`{ foo, bar, baz } = input`) is a modern JavaScript feature that allows for concise object decomposition. It's used in two of the benchmark test cases (Looping and Destructuring).

**Other Alternatives**

If the `reduce()` method or destructuring assignment weren't available, alternative approaches could include:

* Using a traditional for loop with array indices.
* Utilizing other object iteration methods like `Object.keys()`, `Object.entries()`, or `for...in` loops.

However, these alternatives might not offer the same level of conciseness or performance as the tested approaches.

Related benchmarks:

[Object.entries after] Reduce vs Looping vs Ifs vs Destructuring (version: 0)

Comparing performance of: Reduce vs Looping vs Ifs vs Destructuring

Created: 5 years ago by: Guest

Jump to the latest result

Reduce

Looping

Ifs

Destructuring

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):