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Math.sign speed comparison
(version: 1)
Benchmark.js
Comparing performance of:
Math.abs access vs abs function vs compare
Created:
3 years ago
by:
Registered User
Go to the latest result
Script Preparation code:
var x = Math.random() var sign = Math.sign
Tests:
Math.abs access
Math.sign(x)
abs function
sign(x)
compare
x < 0 ? -1 : x > 0 ? 1 : 0
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Math.abs access
abs function
compare
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.15
Browser/OS:
Safari 17 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=506775" width="100%" height="500px"></iframe>
compare
6.8M/s
abs function
6.5M/s
Math.abs access
5.2M/s
View exact numbers
Test name
Executions per second
✓
compare
6,785,628 Ops/sec
abs function
6,461,668 Ops/sec
Math.abs access
5,151,164 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested. **Benchmark Purpose** The benchmark is designed to compare the performance of three different approaches for calculating the absolute value (or sign) of a number in JavaScript. The three approaches are: 1. Directly accessing the `abs` function from the Math library (`Math.abs(x)`). 2. Accessing the `sign` function from the Math library (`Math.sign(x)`). 3. Using a conditional expression to determine the sign of a number based on its value (`x < 0 ? -1 : x > 0 ? 1 : 0`). **Options Comparison** The benchmark is comparing the performance of these three approaches, with each approach being executed multiple times to generate the final execution count. The goal is to determine which approach is the fastest. Pros and Cons of Each Approach: * **Directly accessing `Math.abs(x)`**: This approach is straightforward and easy to understand. However, it may not be optimized for performance, as it involves a function call. + Pros: Easy to implement and understand. + Cons: May not be optimized for performance. * **Accessing `Math.sign(x)`**: This approach is similar to the first one but uses a different method to calculate the sign. It's also not optimized for performance. + Pros: Similar ease of implementation as the first approach. + Cons: Not optimized for performance. * **Conditional expression**: This approach uses a ternary operator to determine the sign based on the value of `x`. While it may be more concise, it can also be less readable and maintainable. + Pros: More concise and potentially easier to understand than the first two approaches. + Cons: May be less readable and maintainable. **Library Used** The benchmark uses the Math library, which provides several utility functions for mathematical operations. The `abs` function is used in the first approach, while the `sign` function is used in the second approach. **Special JS Feature or Syntax** There doesn't appear to be any special JavaScript feature or syntax being tested in this benchmark. However, it's worth noting that the use of the ternary operator (`x < 0 ? -1 : x > 0 ? 1 : 0`) is an example of a concise and expressive way to write conditional logic. **Other Alternatives** If you're interested in exploring alternative approaches for calculating absolute values or signs, here are some other options: * Using the `Math.abs` function with a bitwise AND operator (`x & 0xffffffff`) * Implementing your own `abs` function using bit manipulation * Using a library like Lodash's `abs` function Keep in mind that these alternatives may have different performance characteristics or trade-offs in terms of readability and maintainability. Overall, the benchmark provides a useful insight into the performance characteristics of different approaches for calculating absolute values or signs in JavaScript.
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