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Date.now() vs adding constant
(version: 0)
Comparing performance of:
now() vs Constant addition
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
let time = 1620011656317;
Tests:
now()
time = Date.now();
Constant addition
time += 16.666666666666668;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
now()
Constant addition
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 the performance of JavaScript microbenchmarks is a fascinating topic. **What's being tested?** The provided JSON represents a benchmark that compares two approaches to measure the elapsed time: 1. **Using `Date.now()`**: This approach uses the built-in `Date` object's `now()` method to get the current timestamp. 2. **Adding a constant**: In this approach, a fixed value (16.666666666666668) is added to the initial timestamp using simple arithmetic. **Comparison of approaches** The pros and cons of these two approaches are as follows: * **`Date.now()`**: The benefits include: * Simplicity: Using `Date.now()` is straightforward and easy to understand. * Native performance: This approach uses native JavaScript functions, which can be optimized by the browser's engine. However, there are some potential drawbacks: * Potential precision issues: Depending on the system clock resolution, `Date.now()` might not provide precise timing measurements. * **Adding a constant**: The advantages include: * Precise timing: By adding a fixed value to the initial timestamp, you can accurately measure the elapsed time. However, there are some potential drawbacks: * Increased complexity: This approach requires manual addition of the constant, which can make it more difficult to read and maintain. **Library usage** None of the provided test cases uses any external libraries. The `Date` object is a built-in JavaScript API. **Special JavaScript features or syntax** This benchmark does not use any special JavaScript features or syntax beyond what's required for basic function definitions (e.g., `let`, `function`, and arithmetic operators).
Related benchmarks:
new Date().getTime() vs Date.now()
Date.now() vs new Date().valueOf()
Date.now() vs new Date().getTime(qu)
Date.now() - Date.now() vs new Date() - new Date()
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