Benchmark: or 223423 - MeasureThat.net

Script Preparation code:

var a = {
	a: 0
}

Tests:

0
var b = a.a | 1024
undefined
var c = a.b | 1024

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
0
undefined

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
0	33028168.0 Ops/sec
undefined	32959032.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is tested?**

The provided benchmark tests two different approaches to perform a bitwise OR operation (`|`) on a property `a` and an integer value `1024`.

**Options compared:**

There are two options being compared:

1. **Property access with dot notation**: `var b = a.a | 1024`
2. **Property access with bracket notation**: `var c = a.b | 1024`

**Pros and cons of each approach:**

**Dot notation (`a.a`)**

Pros:

* More readable and intuitive for many developers
* Less error-prone, as it's harder to miss the property name in dot notation

Cons:

* May lead to slower performance due to the need for slower property lookup

**Bracket notation (`a['a']`)**

Pros:

* Faster performance, as it allows direct access to properties using strings (e.g., "a" instead of `a.a`)
* More flexible, as it can be used to dynamically access properties using strings or other expressions

Cons:

* Less readable and less intuitive for many developers
* More error-prone, as the property name is passed as a string, making typos more likely

**Other considerations:**

In modern JavaScript, both approaches are generally considered acceptable. However, in some cases, such as when working with large datasets or performance-critical code, the bracket notation may be preferred due to its potential for better performance.

**Library usage:**

There is no explicit library mentioned in the provided benchmark. However, it's worth noting that JavaScript engines like V8 (used by Chrome) and SpiderMonkey (used by Firefox) have optimized implementations of bitwise operations, which may affect the results of this benchmark.

**Special JS feature or syntax:**

There are no special features or syntax used in this benchmark beyond standard JavaScript.

**Alternatives:**

For measuring performance differences between different approaches to performing bitwise OR operations, MeasureThat.net provides a valuable resource. Other alternatives might include:

* Using a dedicated profiling tool, such as Chrome DevTools' Performance tab
* Writing a custom benchmarking script using a library like Benchmark.js or jsperf
* Using an online benchmarking platform specifically designed for JavaScript performance testing

Keep in mind that the choice of alternative will depend on your specific needs and preferences.

Related benchmarks:

or 223423 (version: 0)

Comparing performance of: 0 vs undefined

Created: one year ago by: Registered User

Jump to the latest result

0

undefined

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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