Benchmark: Reduce vs Map + Math

Script Preparation code:

var data = [
    {
        name: "Budi",
        age: "20"
    },
    {
        name: "Andi",
        age: "15"
    },
    {
        name: "Sinta",
        age: "21"
    },
]

Tests:

Reduce
var lowestAge = data.reduce((lowestAge, dt) => { if (dt.age < lowestAge) { return dt.age; } return lowestAge; }, Number.MAX_SAFE_INTEGER);
Map + Math
var lowestAge = Math.min(...data.map((dt) => dt.age))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reduce
Map + Math

Fastest: N/A

Slowest: N/A

Latest 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 dive into the explanation of the provided benchmark.

**Benchmark Overview**

The benchmark compares two approaches for finding the lowest age in an array of objects: using `reduce()` and using `map()` followed by `Math.min()`. The goal is to determine which approach is faster.

**Options Compared**

Two options are compared:

1. **Reduce**: Uses the `reduce()` method to iterate through the array and find the lowest value.
2. **Map + Math`: Uses the `map()` method to extract the age values from the array, and then uses `Math.min()` to find the lowest value.

**Pros and Cons of Each Approach**

1. **Reduce**:
	* Pros: More concise and expressive code, can be more efficient for finding a single minimum value.
	* Cons: Can be slower for large arrays due to the overhead of callback functions.
2. **Map + Math**:
	* Pros: Easier to read and understand for developers familiar with `map()` and `Math.min()`.
	* Cons: Requires two separate operations (extracting values and finding the minimum), which can lead to more overhead.

**Library Used**

None in this case, as both approaches only use built-in JavaScript functions.

**Special JS Feature or Syntax**

No special features or syntax are used in either approach. Both rely on standard JavaScript methods and operations.

**Benchmark Preparation Code**

The preparation code creates an array of objects with age values:
```javascript
var data = [
  { name: "Budi", age: "20" },
  { name: "Andi", age: "15" },
  { name: "Sinta", age: "21" }
];
```
This is a small dataset, and the benchmark is likely designed to find the lowest age value.

**Other Alternatives**

For finding the lowest value in an array, other approaches could include:

* Using `Array.prototype.reduce()` with a different callback function (e.g., `Math.min` instead of a custom comparison).
* Using `Array.prototype.every()` and checking if all values are greater than or equal to the current minimum.
* Using `Array.prototype.findIndex()` to find the index of the first value that is less than or equal to the current minimum.

However, these alternatives may not be as efficient or concise as the approaches used in the benchmark.

Related benchmarks:

Reduce vs Map + Math (version: 0)

Comparing performance of: Reduce vs Map + Math

Created: 3 years ago by: Guest

Jump to the latest result

Reduce

Map + Math

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):