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pi 180
(version: 0)
Comparing performance of:
precalc vs live
Created:
8 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
let preCalc = Math.PI / 180; let calculationOneX; let calculationOneY; let calculationTwoX; let calculationTwoY;
Tests:
precalc
calculationOneX = 100 + Math.cos(91 * preCalc) * 40; calculationOneY = 100 + Math.sin(91 * preCalc) * 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>
Run tests (2)
Previous results
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Test case name
Result
precalc
live
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Measuring performance in JavaScript can be complex, and there are various approaches to test different scenarios. **Pre-calculating values** In the provided benchmark definition, the script prepares some pre-calculated values using `Math.PI / 180` (precalc) versus directly using `Math.cos(91 * Math.PI / 180)` and `Math.sin(91 * Math.PI / 180)` (live). This is a common optimization technique. **Pros of pre-calculating values:** 1. Reduced calculations during runtime: By calculating `preCalc` beforehand, you avoid the overhead of calculating trigonometric functions at runtime. 2. Improved performance: Pre-calculation can lead to significant performance improvements, especially for frequent calculations. **Cons of pre-calculating values:** 1. Increased memory usage: You need to store the pre-calculated value in memory, which can be a concern for large datasets or applications with limited memory. 2. Potential cache misses: If the pre-calculated value is not stored in a cache (e.g., LRU cache), you may encounter performance issues if other parts of your code frequently access this value. **Pros of using live calculations:** 1. Simplified code: Using `Math.cos` and `Math.sin` directly avoids the need for additional variables and calculations. 2. Reduced memory usage: You don't store any intermediate values, making it a good choice for applications with limited resources. **Cons of using live calculations:** 1. Slower performance: Calculating trigonometric functions at runtime can be slower than pre-calculating them. 2. Higher overhead: More operations are performed during runtime, which may impact overall application performance. In the context of this benchmark, it's likely that the test is comparing the relative performance differences between these two approaches for a specific use case (e.g., rendering graphics or scientific simulations). The live calculation approach provides simpler code and reduced memory usage but comes with potential performance overhead. Pre-calculating values can improve performance but may increase memory usage. The latest benchmark result shows that Chrome 103 on a Desktop with Mac OS X 10.11.6 performs better when using the precalc approach, executing approximately 467,171 times per second. However, this test case has zero executions for the live calculation, indicating potential limitations or issues with this approach.
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