Benchmark: dynamic create object vs array vs buffered

Tests:

dynamic create object integer value
var object = {}; object["p1"] = 1; object["p2"] = 2; object["p3"] = 3; object["p4"] = 4; object["p5"] = 5; object["p6"] = 6; object["p7"] = 7; object["p8"] = 8; object["p9"] = 9;
dynamic create array integer value
var array = []; array.push("p1",1); array.push("p2",2); array.push("p3",3); array.push("p4",4); array.push("p5",5); array.push("p6",6); array.push("p7",7); array.push("p8",8); array.push("p9",9);
dynamic create object string value
var object = {}; object["p1"] = "1"; object["p2"] = "2"; object["p3"] = "3"; object["p4"] = "4"; object["p5"] = "5"; object["p6"] = "6"; object["p7"] = "7"; object["p8"] = "8"; object["p9"] = "9";
dynamic create array string value
var array = []; array.push("p1",1); array.push("p2",2); array.push("p3",3); array.push("p4",4); array.push("p5",5); array.push("p6",6); array.push("p7",7); array.push("p8",8); array.push("p9",9);
buffered array integer values
var array = []; array.length = 18 var i = 0; array[i++] = "p1"; array[i++] = 1; array[i++] = "p2"; array[i++] = 2; array[i++] = "p3"; array[i++] = 3; array[i++] = "p4"; array[i++] = 4; array[i++] = "p5"; array[i++] = 5; array[i++] = "p6"; araay[i++] = 6; array[i++] = "p7"; araay[i++] = 7; array[i++] = "p8"; array[i++] = 8; array[i++] = "p9"; array[i++] = 9;
buffered array string value
var array = []; array.length = 18 var i = 0; array[i++] = "p1"; array[i++] = "1"; array[i++] = "p2"; array[i++] = "2"; array[i++] = "p3"; array[i++] = "3"; array[i++] = "p4"; array[i++] = "4"; array[i++] = "p5"; array[i++] = "5"; array[i++] = "p6"; array[i++] = "6"; array[i++] = "p7"; array[i++] = "7"; array[i++] = "p8"; array[i++] = "8"; array[i++] = "p9"; array[i++] = "9";

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
dynamic create object integer value
dynamic create array integer value
dynamic create object string value
dynamic create array string value
buffered array integer values
buffered array string value

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its test cases.

**Benchmark Overview**

The benchmark measures the performance of three different approaches to dynamically create an object or array:

1. Creating an object using a literal syntax (`var object = {};`).
2. Creating an array using the `push()` method.
3. Using a "buffered" approach, where an array is initialized with a specific length and then elements are pushed into it in a loop.

**Test Cases**

Each test case has a unique name that describes its purpose:

* "dynamic create object integer value"
* "dynamic create object string value"
* "dynamic create array string value"
* "dynamic create array integer value"
* "buffered array string value"
* "buffered array integer values"

The test cases are executed multiple times (the exact number is not specified) and the results are reported in terms of executions per second.

**Interpretation**

Based on the benchmark results, we can see that:

* Creating an object using a literal syntax is the fastest approach.
* Creating an array using the `push()` method is slower than creating an object, but faster than the buffered approach for string values.
* The buffered approach is the slowest, likely due to the overhead of initializing the array with a specific length and then pushing elements into it.

**General Observations**

The benchmark highlights the importance of choosing the right data structure and creation method depending on the use case. In general:

* Literal syntax (e.g., `var object = {};`) is often the fastest and most efficient way to create objects.
* The `push()` method is a convenient way to add elements to an array, but it may incur additional overhead compared to creating the array directly.
* Buffered arrays can be useful for certain use cases where memory allocation needs to be optimized, but they may come at the cost of performance in other scenarios.

Overall, this benchmark provides valuable insights into the performance characteristics of different data structure creation methods and can inform design decisions when working with JavaScript.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser/OS: Chrome 88 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
dynamic create object integer value	881376832.0 Ops/sec
dynamic create array integer value	42840184.0 Ops/sec
dynamic create object string value	876197376.0 Ops/sec
dynamic create array string value	43820948.0 Ops/sec
buffered array integer values	0.0 Ops/sec
buffered array string value	8249500.0 Ops/sec

Related benchmarks:

dynamic create object vs array vs buffered (version: 0)

Comparing performance of: dynamic create object integer value vs dynamic create array integer value vs dynamic create object string value vs dynamic create array string value vs buffered array integer values vs buffered array string value

Created: 8 years ago by: Guest

Jump to the latest result

dynamic create object integer value

dynamic create array integer value

dynamic create object string value

dynamic create array string value

buffered array integer values

buffered array string value

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):