Benchmark: builtin plus operator vs. custom sum method

Tests:

builtin plus operator
const sum = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9;
custom sum method
function getSum(...args) { return args.reduce((a, b) => a + b, 0); } const sum = getSum(1, 2, 3, 4, 5, 6, 7, 8, 9);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
builtin plus operator
custom sum method

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Browser/OS: Chrome 91 on Windows

View result in a separate tab

Test name	Executions per second
builtin plus operator	1411770368.0 Ops/sec
custom sum method	112532832.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**
The benchmark is defined by providing a `Script Preparation Code` and an optional `Html Preparation Code`. However, in this case, both fields are empty, indicating that the script preparation code will be generated automatically by the browser. The benchmark definition also specifies two test cases: "builtin plus operator" and "custom sum method".

**Test Cases**
The test cases compare the performance of two approaches to calculate the sum of an array:

1. **Builtin Plus Operator**: This test case uses the built-in `+` operator to add all numbers in the array.
2. **Custom Sum Method**: This test case defines a custom JavaScript function, `getSum`, which uses the `reduce()` method to add all numbers in the array.

**Options Compared**
The benchmark compares the performance of these two approaches:

* Builtin Plus Operator: Uses the built-in `+` operator to add all numbers in the array.
* Custom Sum Method: Defines a custom JavaScript function, `getSum`, which uses the `reduce()` method to add all numbers in the array.

**Pros and Cons**

* **Builtin Plus Operator**:
	+ Pros:
		- Fast execution
		- Simple implementation
	+ Cons:
		- Limited control over iteration order
		- May be optimized by browsers
* **Custom Sum Method**:
	+ Pros:
		- Control over iteration order
		- More flexible implementation
	+ Cons:
		- Slower execution (due to function call overhead)
		- More complex implementation

**Library and Syntax**
There is no specific library mentioned in the benchmark definition. However, the custom sum method uses the `reduce()` method, which is a part of the ECMAScript standard.

**Special JS Feature or Syntax**
The custom sum method uses the `function` keyword to define a new function, `getSum`, and the `=>` syntax for arrow functions (introduced in ECMAScript 2015). The `reduce()` method is also a part of the ECMAScript standard.

**Other Alternatives**
There are other ways to calculate the sum of an array in JavaScript, such as using a `for` loop or the `Array.prototype.reduce()` method with a callback function. Some examples include:

* Using a `for` loop: `let sum = 0; for (let i = 0; i < arr.length; i++) { sum += arr[i]; }`
* Using `Array.prototype.reduce()`: `arr.reduce((a, b) => a + b, 0)`
* Using `map()` and `reduce()`: `arr.map(x => x).reduce((a, b) => a + b, 0)`

Keep in mind that the performance differences between these approaches may vary depending on the specific use case and browser implementation.

Related benchmarks:

builtin plus operator vs. custom sum method (version: 0)

Comparing performance of: builtin plus operator vs custom sum method

Created: 3 years ago by: Guest

Jump to the latest result

builtin plus operator

custom sum method

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):