Benchmark: pi 180 - MeasureThat.net

Script Preparation code:

var pre = Math.PI / 180;

var calculationOneX;
var calculationOneY;

var calculationTwoX;
var calculationTwoY;

Tests:

precalc
calculationOneX = 100 + Math.cos(91 * pre) * 40; calculationOneY = 100 + Math.sin(91 * pre) * 40;
live
calculationTwoX = 100 + Math.cos(91 * (Math.PI / 180)) * 40; calculationTwoY = 100 + Math.sin(91 * (Math.PI / 180)) * 40;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
precalc
live

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 27 days ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of calculating trigonometric values in JavaScript.

Let's break it down:

**Options being compared:**

* **`precalc` (Test Name: "precalc"):** This approach calculates `Math.PI / 180` once beforehand and stores it in the variable `pre`. Then, within the calculations for `calculationOneX` and `calculationOneY`, it uses this pre-calculated value.
* **`live` (Test Name: "live"):**  This approach calculates `Math.PI / 180` directly inside each calculation (`calculationOneX` and `calculationOneY`).

**Pros and Cons:**

* **`precalc` Pros:** Potentially faster because the division operation (`Math.PI / 180`) is only performed once.
* **`precalc` Cons:**  Takes up additional memory to store the pre-calculated value (`pre`).
* **`live` Pros:** Doesn't require additional memory for storing a pre-calculated value.
* **`live` Cons:** The division operation (`Math.PI / 180`) is performed repeatedly, which can be slightly slower.

**Other Considerations:**

The actual performance difference between these approaches is likely to be very small in most cases.  Modern JavaScript engines are highly optimized, and the cost of a single `Math.PI / 180` calculation is negligible.

**Alternatives:**
* **Memoization:** A more advanced optimization technique than pre-calculation. It stores the results of expensive function calls and returns the cached result if the same inputs are used again.

**Important Note:**  JavaScript's `Math` object uses well-optimized built-in functions for trigonometric calculations. You should generally rely on these functions rather than attempting to implement your own trigonometry from scratch.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Browser/OS: Chrome 65 on Windows

View result in a separate tab

Test name	Executions per second
precalc	994450.4 Ops/sec
live	863508.0 Ops/sec

Related benchmarks:

pi 180 (version: 0)

Comparing performance of: precalc vs live

Created: 6 years ago by: Guest

Jump to the latest result

precalc

live

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 27 days ago):