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Math.floor(Math.random() * 1000000000).toString() vs window.performance.now().toFixed()
(version: 0)
Comparing performance of:
Math.floor(Math.random() * 1000000000).toString() vs window.performance.now().toFixed()
Created:
4 years ago
by:
Guest
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Tests:
Math.floor(Math.random() * 1000000000).toString()
Math.floor(Math.random() * 1000000000).toString()
window.performance.now().toFixed()
window.performance.now().toFixed()
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Math.floor(Math.random() * 1000000000).toString()
window.performance.now().toFixed()
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help explain the benchmark. **Overview** The provided JSON represents a set of benchmarks for measuring the performance of JavaScript code on different browsers and platforms. The benchmark is designed to compare two approaches: converting a large random number to a string using `Math.floor(Math.random() * 1000000000).toString()` versus getting the current time in milliseconds using `window.performance.now().toFixed()`. **Test Cases** There are two test cases: 1. **`Math.floor(Math.random() * 1000000000).toString()`**: This test case measures the performance of converting a large random number to a string. The random number is generated using `Math.random()` and multiplied by 1000000000, which produces a very large number. 2. **`window.performance.now().toFixed()`**: This test case measures the performance of getting the current time in milliseconds using the `performance.now()` function from the Web Performance API. **Options Compared** The two test cases compare different approaches to measuring execution time: 1. **String conversion**: Converting a large random number to a string using `Math.floor(Math.random() * 1000000000).toString()`. This approach can be slow because of the overhead of converting numbers to strings. 2. **Performance API**: Getting the current time in milliseconds using `window.performance.now().toFixed()`. This approach is generally faster than string conversion, as it uses a more efficient timer mechanism. **Pros and Cons** Here are some pros and cons of each approach: * **String conversion**: + Pros: Easy to understand and implement. + Cons: Can be slow due to the overhead of converting numbers to strings. * **Performance API**: + Pros: Generally faster than string conversion, as it uses a more efficient timer mechanism. + Cons: Requires knowledge of the Web Performance API. **Library Usage** The test cases do not use any external libraries, but they rely on the JavaScript engine's built-in functions to generate random numbers and measure execution time. **Special JS Features/Syntax** There are no special JavaScript features or syntax used in these benchmark cases. However, it's worth noting that some browsers may optimize certain JavaScript features or syntax for better performance. **Other Alternatives** If you want to create similar benchmarks, here are some alternatives: * Measure the performance of other mathematical operations, such as adding large numbers or performing arithmetic operations on large arrays. * Compare the performance of different data structures, such as arrays versus objects. * Use different browsers or platforms to compare their JavaScript engine performance. Keep in mind that benchmarking is an art and a science. The results may vary depending on the specific use case and environment.
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