Benchmark: Math.max(...) vs Uint32Array.reduce()

Script Preparation code:

var values = new Uint32Array(600);

for (let i = 0; i < values.length; ++i) {
    values[i] = i % 20;
}

Tests:

Math.max
return Math.max(...values);
Reduce
return values.reduce((prev, curr) => { if (curr > prev) return curr; return prev; }, 0);
Reduce with Math.max
return values.reduce(Math.max, 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Math.max
Reduce
Reduce with Math.max

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared options, pros and cons of each approach, library usage, special JS features or syntax (if any), alternatives, and other considerations.

**What's being tested?**

The provided benchmark compares the speed of three different approaches:

1. `Math.max()`
2. `Array.reduce()` with a custom callback function
3. `Array.reduce()` with `Math.max` as the initial value

The test is focused on comparing the performance of these three approaches.

**Options compared:**

* **Math.max()**: A built-in JavaScript function that returns the maximum value in an array.
* **Array.reduce() with custom callback**: An array method that applies a user-provided callback function to each element, accumulating a result. In this case, the callback function is used to find the maximum value.
* **Array.reduce() with Math.max as initial value**: A variation of the previous approach where `Math.max` is used as the initial value for the reduction.

**Pros and Cons of each approach:**

1. **Math.max()**:
	* Pros: Simple, lightweight, and well-documented.
	* Cons: May not be suitable for all use cases (e.g., when dealing with non-numeric values).
2. **Array.reduce() with custom callback**:
	* Pros: Flexible, can handle non-numeric values, and allows for more control over the result.
	* Cons: Requires defining a custom callback function, which may add complexity.
3. **Array.reduce() with Math.max as initial value**:
	* Pros: Combines the benefits of `Math.max()` and `Array.reduce()`.
	* Cons: May not be suitable for all use cases (e.g., when dealing with non-numeric values).

**Library usage**

There is no explicit library usage in this benchmark. However, it's worth noting that `Array.prototype.reduce()` is a part of the ECMAScript standard and is supported by most modern JavaScript engines.

**Special JS feature or syntax**

The benchmark uses JavaScript 1.x syntax (e.g., `var` declarations) and does not include any advanced features like ES6 modules, arrow functions, or destructuring. If you were to rewrite this benchmark using newer JavaScript features, it would likely require significant changes to the code.

**Alternatives**

Other alternatives for finding the maximum value in an array could be:

* Using `Math.max.apply()` (a variation of `Math.max()`)
* Using a loop with indexing (e.g., `max = 0; for (let i = 0; i < values.length; i++) { max = Math.max(max, values[i]); }`)
* Using a library like Lodash (`_max` function)

Keep in mind that the choice of approach depends on the specific use case and performance requirements.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:48.0) Gecko/20100101 Firefox/48.0

Browser/OS: Firefox 48 on Mac OS X 10.6

View result in a separate tab

Test name	Executions per second
Math.max	12095.1 Ops/sec
Reduce	484467.3 Ops/sec
Reduce with Math.max	2104.6 Ops/sec

Related benchmarks:

Math.max(...) vs Uint32Array.reduce() (version: 0)

Compare speed of Math.max() vs Array.reduce().

Comparing performance of: Math.max vs Reduce vs Reduce with Math.max

Created: one year ago by: Guest

Jump to the latest result

Math.max

Reduce

Reduce with Math.max

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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