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Date.now() vs +new Date()
(version: 0)
Comparing performance of:
keme1 vs keme2
Created:
5 years ago
by:
Guest
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HTML Preparation code:
<script src=''></script>
Script Preparation code:
var timestamp = null;
Tests:
keme1
timestamp = Date.now();
keme2
timestamp = + new Date;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
keme1
keme2
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark test and its options. **Benchmark Definition** The provided JSON represents a JavaScript microbenchmark that tests two different ways to get the current timestamp: `Date.now()` vs `+new Date()`. The benchmark definition specifies how to prepare the script and HTML for execution. **Options Compared** Two options are being compared: 1. `Date.now()`: This method returns the number of milliseconds since the Unix epoch (January 1, 1970, 00:00:00 UTC) as an integer. 2. `+new Date()`: This method converts a new Date object to its numeric representation in milliseconds. **Pros and Cons** - **`Date.now()`**: + Pros: Simple, straightforward, and widely supported. + Cons: May not be suitable for all use cases (e.g., when working with older browsers or systems). - **`+new Date()`**: + Pros: Can provide a more precise timestamp than `Date.now()`, especially in older browsers that might have issues with milliseconds. + Cons: Less intuitive, may require explicit conversion to a numeric value. **Library and Special JS Features** Neither of the options relies on any specific library. However, if you were to compare other methods, libraries like `moment.js` or `date-fns` could be used for date manipulation. **Special JS Feature** There is no special JavaScript feature being tested in this benchmark. Both options are standard and widely supported. **Other Alternatives** If you wanted to test different timestamp-related functions, some alternatives might include: - `Performance.now()`: Returns the value (in fractional seconds) of a performance counter that can be used as a clock. - `Date.UTC(year, month, day, hour, minute, second, ms)` or its shorthand `Date.UTC()`: Returns the timestamp in milliseconds for a specific UTC date and time. These alternatives would depend on your specific use case and requirements.
Related benchmarks:
Date.now() vs new Date().getTime()
Date.now() vs new Date()
Date.now() - Date.now() vs new Date() - new Date()
Date.now() vs +new Date() test
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