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parseInt-vs-math.floor2agasdsgsa
(version: 0)
Check the impact between the two
Comparing performance of:
parseInt vs Math.floor
Created:
2 years ago
by:
Guest
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Tests:
parseInt
let elapsedTime = Date.now(); let milliseconds = Math.floor((elapsedTime % 1000) / 10); let seconds = Math.floor((elapsedTime / 1000) % 60); let minutes = Math.floor((elapsedTime / (1000 * 60)) % 60); let hours = Math.floor((elapsedTime / (1000 * 60 * 60)) % 24); milliseconds = milliseconds.toString().padStart(2, "0"); seconds = seconds.toString().padStart(2, "0"); minutes = minutes.toString().padStart(2, "0"); hours = hours.toString().padStart(2, "0");
Math.floor
let elapsedTime = Date.now(); new Date(elapsedTime).toISOString().slice(11, -1);
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Suite status:
<idle, ready to run>
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Test case name
Result
parseInt
Math.floor
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net. The benchmark compares the performance of two approaches: `parseInt` and `Math.floor`. Both methods are used to extract time components from a Unix timestamp (in milliseconds) extracted from the current date. **Options Compared** Two options are compared: 1. **parseInt**: This method uses a regular expression to parse the string representation of the time in seconds, minutes, hours, and days. It is not designed for precise time calculation. 2. **Math.floor**: This built-in JavaScript function returns the largest integer less than or equal to the given number. When used with `Date.now()` and `%` operators, it can be used to extract time components. **Pros and Cons of Each Approach** 1. **parseInt**: * Pros: Easy to implement, suitable for simple date parsing tasks. * Cons: Inefficient due to regular expression overhead, may not work correctly for all dates. 2. **Math.floor**: * Pros: Fast, reliable, and widely supported. * Cons: May not be as intuitive or easy to read as `parseInt`. **Library and Syntax Used** In this benchmark, no external libraries are used. However, the use of `%` operator with `Date.now()` is a common JavaScript syntax for extracting time components. **Special JS Feature/ Syntax** None mentioned in this explanation. **Other Alternatives** If you need more precise control over date calculations or performance optimizations, consider using alternative approaches: 1. **Date objects**: Create a Date object from the Unix timestamp and use its built-in methods to extract time components. 2. **Performance-intensive libraries**: Consider using libraries like moment.js for date manipulation and parsing. **Benchmark Preparation Code** The provided script preparation code is not necessary in this case, as the benchmark definitions already contain the logic for extracting time components. In summary, the benchmark compares two approaches for extracting time components from a Unix timestamp: `parseInt` (with regular expression) and `Math.floor`. While both methods have their pros and cons, `Math.floor` is generally considered faster and more reliable.
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