Benchmark: Spread vs. Apply

Script Preparation code:

var arr = [];
for (var i = 0; i < 2048; i++) {
  arr.push(Math.floor(Math.random() * 4096));
}

Tests:

Apply
Math.max.apply(arr);
Apply + concat with existing args
Math.max.apply(arr.concat([1, 2, 4, 2, 3, 1, 2]));
Spread
Math.max(...arr);
Spread with existing args
Math.max(1, 2, 4, 2, 3, 1, 2, ...arr);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Apply
Apply + concat with existing args
Spread
Spread with existing args

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Definition**

The provided JSON defines a JavaScript microbenchmarking test case named "Spread vs. Apply". The script preparation code initializes an array `arr` with 2048 random integers, which will be used as input for the benchmarking tests.

**Options Compared**

The benchmark compares four different approaches to find the maximum value in the `arr` array:

1. **Apply**: Uses the `Math.max.apply()` method to find the maximum value.
2. **Apply + concat with existing args**: Extends the original `arr` array by concatenating an additional set of numbers and then uses `Math.max.apply()` to find the maximum value.
3. **Spread**: Uses the spread operator (`...`) to pass a copy of the `arr` array as individual arguments to `Math.max()`.
4. **Spread with existing args**: Extends the original `arr` array by concatenating an additional set of numbers and then uses the spread operator to pass a copy of the resulting array as individual arguments to `Math.max()`.

**Pros and Cons**

* **Apply**: Pros: concise, efficient; Cons: may not be supported in older browsers or environments that don't support `apply()`.
* **Apply + concat with existing args**: Pros: tests the effect of concatenating an additional set of numbers on performance; Cons: introduces unnecessary complexity and potential performance overhead.
* **Spread**: Pros: modern, concise, and efficient; Cons: may not be supported in older browsers or environments that don't support spread syntax.
* **Spread with existing args**: Pros: similar to "Spread", but tests the effect of concatenating an additional set of numbers; Cons: still introduces unnecessary complexity.

**Libraries and Special JS Features**

None of the test cases explicitly use any external libraries, but it's worth noting that `Math.max()` is a built-in JavaScript function. The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as part of the modernization efforts to make JavaScript more concise and efficient.

**Other Considerations**

The benchmarking results show the number of executions per second for each test case on a Chrome 64 browser running on Windows, along with various metadata about the testing environment. This allows users to compare the performance characteristics of different approaches across different browsers and environments.

Some possible alternatives or variations for this benchmark could include:

* Using other languages or implementations (e.g., Python, Java) to compare the performance of these operations
* Incorporating additional inputs or edge cases to test the robustness of each approach
* Evaluating the performance impact of caching or memoization in JavaScript functions
* Adding more complex or dynamic scenarios to better represent real-world use cases.

Latest run results:

Run details: (Test run date: 2025 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36

Browser/OS: Chrome 64 on Windows

View result in a separate tab

Test name	Executions per second
Apply	1804889.1 Ops/sec
Apply + concat with existing args	162578.0 Ops/sec
Spread	129384.3 Ops/sec
Spread with existing args	128478.4 Ops/sec

Related benchmarks:

Spread vs. Apply (version: 0)

Comparing performance of: Apply vs Apply + concat with existing args vs Spread vs Spread with existing args

Created: 6 years ago by: Guest

Jump to the latest result

Apply

Apply + concat with existing args

Spread

Spread with existing args

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):