Benchmark: randoms js - MeasureThat.net

Tests:

floor date x rand
Math.floor(Date.now() * Math.random());
date x rand
Date.now() * Math.random()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
floor date x rand
date x rand

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is a crucial aspect of ensuring the efficiency and reliability of web applications. The provided benchmark definition and test cases help us understand what's being measured.

**Overview**

The provided JSON represents a basic benchmark setup, where two individual test cases are defined:

1. `floor date x rand`: This test case measures the performance of the expression `Math.floor(Date.now() * Math.random())`.
2. `date x rand`: This test case measures the performance of the expression `Date.now() * Math.random()`.

**Options compared**

These two test cases differ in how they handle rounding:

* `floor date x rand` uses `Math.floor()` to round down the result.
* `date x rand` does not use any explicit rounding function, relying on JavaScript's default integer conversion behavior.

**Pros and Cons of each approach:**

1. **Rounding with Math.floor()**
	* Pros:
		+ Provides a clear and predictable outcome.
		+ Can be useful for tests where exact control over the result is required.
	* Cons:
		+ May not accurately represent real-world scenarios, as `Date.now()` returns a floating-point value.
2. **Default integer conversion**
	* Pros:
		+ More representative of real-world behavior, as JavaScript's default integer conversion can produce unexpected results due to the limitations of floating-point arithmetic.
	* Cons:
		+ Outcome is less predictable and may vary depending on the specific browser or environment used.

**Library usage**

None of the test cases explicitly use any libraries. The expressions themselves are simple mathematical operations.

**Special JS features/syntax**

The `Date.now()` function returns the number of milliseconds since January 1, 1970, at 00:00 UTC (Coordinated Universal Time). This is a built-in JavaScript feature and is not specific to any particular library or syntax extension.

**Other alternatives**

To measure performance in JavaScript, alternative approaches could include:

* **CPU-bound microbenchmarks**: Instead of focusing on JavaScript-specific features, you might measure the performance of CPU-intensive tasks, such as matrix operations or cryptographic calculations.
* **WebAssembly benchmarks**: If you're interested in measuring the performance of compiled languages like C or Rust, WebAssembly (WASM) could be a suitable alternative.
* ** benchmarking libraries**: There are several JavaScript benchmarking libraries available, such as Benchmark.js, JSMeter, or jsperf. These libraries provide more features and flexibility than a simple JSON definition.

Keep in mind that the choice of approach depends on your specific goals and requirements. If you're interested in measuring JavaScript performance specifically, understanding the nuances of the language's behavior and its interactions with hardware can be crucial to achieving accurate results.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Browser/OS: Chrome 100 on Windows

View result in a separate tab

Test name	Executions per second
floor date x rand	1423383.5 Ops/sec
date x rand	1816158.6 Ops/sec

Related benchmarks:

randoms js (version: 0)

Comparing performance of: floor date x rand vs date x rand

Created: 2 years ago by: Guest

Jump to the latest result

floor date x rand

date x rand

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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