Benchmark: Add object/add array

Tests:

add object
var x = {}; for (var i=0; i < 1000; i++) { x[i] = {i: i, "with": "data"}; }
add array
var x = {}; for (var i=0; i < 1000; i++) { x[i] = [i,i, "with", "data"]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
add object
add array

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; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Windows

View result in a separate tab

Test name	Executions per second
add object	102468.5 Ops/sec
add array	56497.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**What is tested?**

The provided JSON represents two test cases: creating and adding an object versus creating and adding an array to an existing object. The tests are designed to measure the performance difference between these two approaches.

**Options compared:**

There are two main options being compared:

1. **Creating and adding an object**: This involves creating a new object `x` and then using a loop to add properties (`i`, `with`, and `data`) to it.
2. **Creating and adding an array**: Similar to the first option, but instead of creating an object, a new array is created and elements are added to it.

**Pros and Cons:**

1. **Creating and adding an object**:
	* Pros:
		+ Can be more efficient for smaller objects or when you need fine-grained control over properties.
		+ Might be faster for certain scenarios due to the nature of JavaScript's object model.
	* Cons:
		+ Requires more memory allocation and garbage collection, which can impact performance in large-scale applications.
2. **Creating and adding an array**:
	* Pros:
		+ Typically faster than creating and adding objects due to the optimized performance of arrays.
		+ Often used when working with numeric data or when the order of elements matters.
	* Cons:
		+ Can be less flexible for smaller objects or when you need fine-grained control over properties.

**Other considerations:**

When choosing between these two approaches, consider the specific requirements of your application. If you're dealing with large datasets or need to optimize performance, arrays might be a better choice. However, if you need more flexibility and control over property names or values, creating and adding objects might be the way to go.

**Library usage:**

There is no library mentioned in the provided JSON. The tests seem to rely on basic JavaScript syntax and built-in data structures.

**Special JS feature/syntax:**

None are explicitly mentioned. However, note that these tests do not use any modern JavaScript features like async/await, Promises, or `let`/`const` declarations, which might affect their behavior.

**Benchmark preparation code:**

The provided JSON does not include script preparation code for the benchmarks. This is likely because the goal of the benchmark is to measure the performance difference between creating and adding an object versus an array, rather than optimizing the creation process itself.

**Alternatives:**

If you're looking for alternatives or variations on these tests, consider exploring other microbenchmarking tools and test cases, such as:

* Micro-optimization benchmarks like the ones provided by [jsbench.me](http://jsbench.me/)
* Performance benchmarking libraries like [BenchmarkJS](https://github.com/jtobin/benchmarkjs)

Related benchmarks:

Add object/add array (version: 0)

Create and add of object vs create and add array

Comparing performance of: add object vs add array

Created: 9 years ago by: Guest

Jump to the latest result

add object

add array

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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