Benchmark: push, push.apply, concat, array access

Tests:

push
var params = [1,2,3,4,5]; params.push(6); params.push(7); params.push(8); params.push(9);
push.apply
var params = [1,2,3,4,5]; params.push.apply(params, [6,7,8,9]);
c
var params = [1,2,3,4,5]; params.concat(params, [6,7,8,9]);
array assignment
var params = [1,2,3,4,5]; params[params.length] = 6; params[params.length] = 7; params[params.length] = 8; params[params.length] = 9;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
push.apply
c
array assignment

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is an essential task for developers, and MeasureThat.net provides a valuable platform for benchmarking various scenarios.

Let's break down the provided JSON data:

**Benchmark Definition**

The `Name` field indicates that the benchmark measures four different approaches to adding elements to an array: `push`, `push.apply`, `concat`, and array assignment (`[params.length] = value`). The `Description` field is empty, but it should contain a brief explanation of what this benchmark tests.

**Script Preparation Code**

There are no script preparation codes provided for any test case. This suggests that the benchmark starts from an initial state with an empty or predefined array.

**Html Preparation Code**

Again, there are no html preparation codes provided.

Now, let's analyze each individual test case:

1. **`push`**: This test case pushes elements to the end of the `params` array using the built-in `push` method.
	* Pros: Simple and straightforward implementation.
	* Cons: May incur overhead due to repeated function calls.
2. **`push.apply`**: Similar to the previous test case, but uses the `push.apply` method to push elements onto the array.
	* Pros: Can be more efficient than `push` since it reduces the number of function calls.
	* Cons: May not work correctly with non-array values or arrays with a different length.
3. **`c`**: This test case appears to be a typo and should be labeled as `concat`. It concatenates two arrays using the built-in `concat` method.
	* Pros: Efficient for small arrays, but can lead to performance issues for large arrays due to the creation of intermediate arrays.
	* Cons:
4. **`array assignment`**: This test case assigns values to specific indices in the array using the syntax `[params.length] = value`.
	* Pros: Fast and efficient, as it directly accesses and updates memory locations.
	* Cons: May not be compatible with all environments or browsers.

**Library usage**

None of the provided test cases rely on external libraries. However, if any of these tests were to use a library, they would likely utilize built-in JavaScript methods like `push`, `concat`, or array assignment syntax.

**Special JS features/syntax**

There are no special JavaScript features or syntax used in these test cases. The code is straightforward and focuses on demonstrating the different approaches for adding elements to an array.

Now that we've analyzed each test case, let's discuss other alternatives:

* **Manual implementation**: Instead of using built-in methods like `push`, `concat`, or array assignment syntax, developers could implement their own custom functions for adding elements to arrays. This would likely lead to slower performance due to the overhead of function calls and potential errors.
* **NativeArray**: Some modern browsers provide a `NativeArray` class that provides optimized methods for array operations. If MeasureThat.net supports this feature, it could be an alternative to using built-in JavaScript methods.

Overall, these test cases demonstrate the different approaches for adding elements to arrays in JavaScript, highlighting the trade-offs between simplicity, efficiency, and compatibility.

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/89.0.4389.114 Safari/537.36

Browser/OS: Chrome 89 on Windows

View result in a separate tab

Test name	Executions per second
push	19592004.0 Ops/sec
push.apply	10294129.0 Ops/sec
c	2895478.8 Ops/sec
array assignment	21574440.0 Ops/sec

Related benchmarks:

push, push.apply, concat, array access (version: 0)

push, push.apply, concat, array access

Comparing performance of: push vs push.apply vs c vs array assignment

Created: 6 years ago by: Guest

Jump to the latest result

push

push.apply

c

array assignment

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):