Benchmark: rest args vs arguments, spread vs apply (2)

Script Preparation code:

let c1 = 0;
function f1() {
  	'use strict';
	c1++;
}

let c2 = 0;
function f2() {
  	'use strict';
	c2++;
}

let c3 = 0;
function f3() {
  	'use strict';
	c3++;
}

let c4 = 0;
function f4() {
  	'use strict';
	c4++;
}

function testRestArgsSpread(...args) {
  	f1(...args);
}

function testRestArgsApply(...args) {
  	f2.apply(undefined, args);
}

function testArgumentsSpread() {
  	f3(...arguments);
}

function testArgumentsApply() {
  	f4.apply(undefined, arguments);
}

Tests:

rest args spread
testRestArgsSpread('a', 1, 'b', 2, 'c', 3);
rest args apply
testRestArgsApply('a', 1, 'b', 2, 'c', 3);
arguments spread
testArgumentsSpread('a', 1, 'b', 2, 'c', 3);
arguments apply
testArgumentsApply('a', 1, 'b', 2, 'c', 3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
rest args spread
rest args apply
arguments spread
arguments apply

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
rest args spread	8727174.0 Ops/sec
rest args apply	4586285.5 Ops/sec
arguments spread	8798326.0 Ops/sec
arguments apply	4558883.5 Ops/sec

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 is being tested.

**Benchmark Definition**

The benchmark measures the performance of three different approaches to pass arguments to functions in JavaScript:

1. **Rest Args (Spread)**: Using the rest parameter syntax (`...args`) to pass an array of values as a single argument.
2. **Arguments.apply()**: Using the `apply()` method to call a function with an array of values as its first argument.

The benchmark also includes two additional test cases:

3. **Arguments Spread**: Using the `arguments` object to access an array of values passed to a function.
4. **Arguments.apply()**: Using the `apply()` method to call a function with the `arguments` object as its first argument.

**Options Compared**

We have four options being compared in this benchmark:

* Rest Args (Spread)
* Arguments.apply()
* Arguments Spread
* Arguments.apply()

These options are used in different test cases, and their performance is measured.

**Pros and Cons of Each Approach**

Here's a brief summary of the pros and cons of each approach:

1. **Rest Args (Spread)**:
	* Pros: Readable, concise syntax; easy to understand.
	* Cons: Can lead to ambiguity if not used carefully; may not be compatible with older browsers.
2. **Arguments.apply()**:
	* Pros: Widely supported across browsers; can be used in older JavaScript versions.
	* Cons: Less readable and more verbose than rest args; requires calling `apply()` explicitly.
3. **Arguments Spread**:
	* Pros: Can be used in combination with other approaches (e.g., rest args); concise syntax.
	* Cons: May not be as readable as rest args; less widely supported across browsers.
4. **Arguments.apply() (again)**:
	* Same pros and cons as above, but with the additional consideration that it's being tested again for comparison.

**Libraries Used**

There is no explicit library mentioned in the benchmark definition or test cases. However, some libraries may be indirectly involved due to browser-specific features:

1. **Chrome Browser**: The benchmark uses Chrome 114 as the target browser, which includes modern JavaScript features and APIs.
2. **Gecko Engine (Safari)**: Safari is a variant of the Gecko engine, which powers Chrome on macOS.

**Special JS Features or Syntax**

The benchmark uses the following special features or syntax:

1. `...args` (rest parameter syntax) in test cases 1-4
2. `arguments` object in test cases 3 and 4
3. `apply()` method in test cases 1-4

Note that the use of `let` and arrow functions (`=>`) is not explicitly mentioned, but they are implied due to the syntax used in the benchmark definition.

**Alternatives**

Other alternatives for passing arguments to functions in JavaScript include:

1. **Callback Functions**: Using a separate function as an argument to be called by the main function.
2. **Function Composition**: Breaking down complex functions into smaller, reusable components using function composition techniques.
3. **Higher-Order Functions**: Using functions that take other functions as arguments or return functions as output.

These alternatives may have different performance characteristics and trade-offs compared to the approaches tested in this benchmark.

Related benchmarks:

rest args vs arguments, spread vs apply (2) (version: 0)

Comparing performance of: rest args spread vs rest args apply vs arguments spread vs arguments apply

Created: one year ago by: Guest

Jump to the latest result

rest args spread

rest args apply

arguments spread

arguments apply

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):