Benchmark: Testing performance of Object.keys vs simple get

Script Preparation code:

var obj = {
  'a': 1,
  'b': 1,
  'c': 1,
  'd': 1,
  'e': 1,
  'f': 1,
  'g': 1
};

Tests:

Object keys
for (var i=10000; i > 0; i--) { Object.keys(obj).forEach(key => console.log(key)); }
Simple
for (var i=10000; i > 0; i--) { console.log(obj.a); console.log(obj.b); console.log(obj.c); console.log(obj.d); console.log(obj.e); console.log(obj.f); console.log(obj.g); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object keys
Simple

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Overview**

MeasureThat.net is a website where users can create and run JavaScript microbenchmarks to compare the performance of different approaches. In this case, we have two benchmark test cases: "Object keys" and "Simple".

**Benchmark Definition JSON**

The Benchmark Definition JSON contains information about the benchmark being created. Here's what it tells us:

* `Name`: The name of the benchmark, which is "Testing performance of Object.keys vs simple get".
* `Description`: An empty description, suggesting that no specific test case or scenario is mentioned.
* `Script Preparation Code`: A JavaScript code snippet that creates an object `obj` with 7 properties, all initialized to 1. This object will be used as the input for both benchmark test cases.
* `Html Preparation Code`: An empty string, indicating that no HTML preparation code is required.

**Individual Test Cases**

We have two individual test cases:

### Object keys

This test case uses the `Object.keys()` method to iterate over the properties of the `obj` object. The benchmark script:
```javascript
for (var i=10000; i > 0; i--) {
  Object.keys(obj).forEach(key => console.log(key));
}
```
The `Object.keys()` method returns an array of strings representing the property names of the `obj` object. The `forEach()` method is then used to iterate over this array, logging each property name to the console.

### Simple

This test case uses a simple loop to log the values of individual properties of the `obj` object:
```javascript
for (var i=10000; i > 0; i--) {
  console.log(obj.a);
  console.log(obj.b);
  console.log(obj.c);
  console.log(obj.d);
  console.log(obj.e);
  console.log(obj.f);
  console.log(obj.g);
}
```
This approach is less efficient than using `Object.keys()` because it requires individual log statements for each property, which can lead to more overhead and slower performance.

**Library Used**

In both test cases, the `console` object is used. The `console` object is a built-in JavaScript object that provides methods for logging messages to the console. It's not specific to any library or framework.

**Special JS Features/ Syntax**

There are no special JavaScript features or syntaxes used in these benchmark test cases.

**Pros and Cons of Different Approaches**

* **Object.keys()**: This approach is efficient because it uses a single method call to retrieve an array of property names, which can be faster than individual log statements.
	+ Pros: Efficient, easy to read, and maintain.
	+ Cons: May require additional processing time for large datasets.
* **Simple**: This approach requires more log statements, which can lead to slower performance.
	+ Pros: Easy to understand and implement.
	+ Cons: Less efficient, may require more processing power.

**Other Alternatives**

If you wanted to benchmark other approaches, such as using `for...in` or `for...of` loops, you could add additional test cases. For example:

* Using `for...in`: This would iterate over the properties of the object using a loop that accesses each property directly.
* Using `for...of`: This would use a loop that iterates over an iterator-like object (not available in older browsers).

Keep in mind that the performance differences between these approaches may be small and depend on various factors, such as the specific JavaScript engine, browser, or system.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Windows

View result in a separate tab

Test name	Executions per second
Object keys	2.7 Ops/sec
Simple	2.7 Ops/sec

Related benchmarks:

Testing performance of Object.keys vs simple get (version: 0)

Comparing performance of: Object keys vs Simple

Created: one year ago by: Guest

Jump to the latest result

Object keys

Simple

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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