var date = new Date();
window.test_results = {};
let hours = date.getHours();
let minutes = date.getMinutes();
let seconds = date.getSeconds();
let mseconds = date.getMilliseconds();
window.test_results['date methods'] = {hours: hours, minutes: minutes, seconds: seconds, mseconds: mseconds};
let msec = parseInt(date, 10)
let sec_num = msec * 0.001;
let hours = Math.floor(sec_num / 3600);
let minutes = Math.floor((sec_num - (hours * 3600)) / 60);
let seconds = sec_num - (hours * 3600) - (minutes * 60);
let mseconds = Math.floor(msec - seconds * 1000);
window.test_results['individual calculations'] = {hours: hours, minutes: minutes, seconds: seconds, mseconds: mseconds};
let msec = parseInt(date, 10)
let sec_num = msec * 0.001;
let hours = Math.floor(sec_num / 3600);
let minutes = Math.floor((sec_num % 3600) / 60);
let seconds = Math.floor(sec_num % 60);
let mseconds = Math.floor(msec % seconds);
window.test_results['modulus calculations'] = {hours: hours, minutes: minutes, seconds: seconds, mseconds: mseconds};
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Date() methods | |
Individual calculations | |
Modulus calculations |
Test name | Executions per second |
---|---|
Date() methods | 331856.5 Ops/sec |
Individual calculations | 70059.4 Ops/sec |
Modulus calculations | 66452.6 Ops/sec |
Let's dive into the world of JavaScript microbenchmarks.
Benchmark Overview
The provided benchmark, "Date to time calculation", compares three different methods of converting a Date object to hours, minutes, seconds, and milliseconds. The goal is to measure which method is the most efficient in terms of execution speed.
Test Cases
There are three test cases:
Comparison of Approaches
Each approach has its pros and cons:
Libraries and Special Features
There are no libraries explicitly mentioned in the benchmark, but it's worth noting that the Date
object is a built-in JavaScript construct. No special features are used in this benchmark.
Alternative Approaches
If you were to modify or extend this benchmark, some alternative approaches you could consider:
Date.getTime()
: Instead of using individual methods (e.g., getHours()
, getMinutes()
), use the getTime()
method to retrieve a timestamp as an integer. This can be more efficient for large date ranges.Math.abs
and Math.floor
: When performing calculations, consider using Math.abs
to avoid potential issues with negative numbers and Math.floor
to round down to the nearest whole number.These are just a few ideas for extending or modifying this benchmark. The choice of approach ultimately depends on the specific requirements and constraints of your project.