Benchmark: Object.values overhead cost1

Script Preparation code:

var myObj = {};
for (var i = 0; i < 15; i++) {
    myObj['val' + i] = 'val' + i;
}
var myObjValues = Object.values(myObj);

Tests:

Call Object.values on each execution
var curObjValues = Object.values(myObj); var myStr = ''; for (var i = 0; i < curObjValues.length; i++) { myStr += curObjValues[i]; }
Use shared Object.values
var curObjValues = myObjValues; var myStr = ''; for (var i = 0; i < curObjValues.length; i++) { myStr += curObjValues[i]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Call Object.values on each execution
Use shared Object.values

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmarking test and analyze what's being tested, compared, and the pros/cons of different approaches.

**Benchmark Definition JSON**

The test case is designed to measure the overhead cost of calling `Object.values()` in JavaScript. The script preparation code creates a large object (`myObj`) with 15 properties, and then calls `Object.values()` twice: once on each execution.

**Options Being Compared**

There are two options being compared:

1. **Calling `Object.values()` on each execution**: In this approach, the `Object.values()` method is called separately for each iteration of a loop.
2. **Using shared `Object.values()`**: In this approach, the result of `Object.values()` is stored in a variable (`curObjValues`) and reused across multiple iterations.

**Pros/Cons of Each Approach**

1. **Calling `Object.values()` on each execution**:
	* Pros: This approach may be more intuitive for developers who are familiar with working with individual values rather than accessing them through an array.
	* Cons: Repeatedly calling `Object.values()` can lead to performance overhead due to the method invocation and array creation.
2. **Using shared `Object.values()`**:
	* Pros: This approach reduces the number of `Object.values()` invocations, which can improve performance by minimizing method call overhead and reducing memory allocation for arrays.
	* Cons: Reusing a variable across iterations may lead to temporary value loss (if the variable is reassigned) or potential issues with modifying the original object.

**Library Used**

There doesn't appear to be any external library used in this benchmark. `Object.values()` is a built-in JavaScript method.

**Special JS Features/Syntax**

None mentioned explicitly, but keep in mind that other JavaScript features like closures, async/await, or modernized syntax might affect the performance of these test cases. However, for simplicity and focus on the specific comparison being made, it's likely that this benchmark is designed to isolate the impact of `Object.values()` invocation frequency.

**Other Alternatives**

To explore alternative approaches, you could consider the following:

* Using a more efficient data structure, such as an array or a typed array, instead of an object with many properties.
* Implementing a custom iterator for accessing `Object.values()` values without creating an additional array.
* Compiling JavaScript to machine code using tools like V8's WebAssembly or SpiderMonkey's Just-In-Time (JIT) compiler.

By analyzing and experimenting with different approaches, you can gain insights into the performance characteristics of your specific use case and optimize it accordingly.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36

Browser/OS: Chrome 100 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Call Object.values on each execution	3229124.5 Ops/sec
Use shared Object.values	10401839.0 Ops/sec

Related benchmarks:

Object.values overhead cost1 (version: 0)

Comparing performance of: Call Object.values on each execution vs Use shared Object.values

Created: 2 years ago by: Guest

Jump to the latest result

Call Object.values on each execution

Use shared Object.values

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):