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acos vs atan2
(version: 0)
Comparing performance of:
acos vs atan2
Created:
5 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var N = 1000000; var x = new Float32Array(N); var y = new Float32Array(N); for (var i = 0; i < N; ++i) { x[i] = 100 * Math.random(); y[i] = 100 * Math.random(); }
Tests:
acos
var fn = Math.acos; for (var i = 0; i < N; ++i) { fn(x[i]/sqrt(x[i]*x[i]+y[i]*y[i])); }
atan2
var fn = Math.atan; for (var i = 0; i < N; ++i) { fn(y[i], x[i]); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
acos
atan2
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one month ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Browser/OS:
Chrome 149 on Windows
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<iframe src="https://measurethat.net/Embed?id=629485" width="100%" height="500px"></iframe>
atan2
299/s
acos
0/s
View exact numbers
Test name
Executions per second
✓
atan2
299 Ops/sec
acos
0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its options. **Benchmark Definition** The test compares two JavaScript functions: `Math.acos` (acos) and `Math.atan2` (atan2). Both functions are used to calculate the inverse cosine and inverse tangent of a given value, respectively. However, `Math.atan2` also takes into account the quadrant of the angle. **Options compared** The test compares two approaches: 1. `Math.acos`: This function uses the arcsine (inverse sine) formula to calculate the angle, which can lead to inaccurate results for certain input values. 2. `Math.atan2`: This function uses a combination of the arctangent (inverse tangent) and quadrant-dependent calculations to ensure accurate results across all quadrants. **Pros and Cons** * **`Math.acos`**: + Pros: simpler implementation, faster execution. + Cons: can lead to inaccurate results for certain input values. * **`Math.atan2`**: + Pros: more accurate results across all quadrants, handles edge cases better. + Cons: slower execution due to the additional calculations. **Library** There is no library explicitly mentioned in the benchmark definition. However, `Math` functions are part of the standard JavaScript library, which means they are available on most platforms and browsers. **Special JS feature or syntax** None of the test cases use any special JavaScript features or syntax that would require explanation outside of this context. **Other alternatives** If you wanted to write a similar benchmark for other inverse trigonometric functions in JavaScript, you could consider testing: * `Math.asin` (arcsine) * `Math.atan` (arctangent) with the same quadrant-dependent calculation as `Math.atan2` * Other libraries or frameworks that provide alternative implementations of these functions. Keep in mind that writing a benchmark for inverse trigonometric functions can be complex due to the mathematical intricacies involved, so it's essential to carefully consider the test cases and options compared.
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