var dateStrings = Array(10000).fill(null).map(() => (new Date()).toISOString());
var padDate = date => (date < 10 ? `0${date}` : date);
dateStrings.map((d) => {
const date = new Date(d);
return `${padDate(date.getDate())}.${padDate(date.getMonth() + 1)}.${padDate(date.getYear())}`;
});
dateStrings.map((d) => {
const [year, month, day] = d.split('T')[0].split('-');
return `${day}.${month}.${year}`;
});
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Parse Date | |
String split |
Test name | Executions per second |
---|---|
Parse Date | 106.1 Ops/sec |
String split | 216.2 Ops/sec |
Let's break down the provided JSON data and explain what's being tested, compared, and other considerations.
Benchmark Definition
The benchmark definition is a JavaScript code snippet that defines two test cases: String split date vs parse date 3
and its corresponding Test Name
. The benchmark prepares an array of 10,000 date strings by mapping over an array of 10,000 dates (using new Date()
and toISOString()
) and padding the date components with zeros.
Options Compared
The two test cases being compared are:
split()
method to extract year, month, and day components from each date string.Date
object for each date string using new Date()
and then extracts the year, month, and day components.Pros and Cons
Here are some pros and cons of each approach:
Date
objects.Library/Function
The padDate()
function is used in both test cases. This function takes a date component (day, month, year) and pads it with zeros if necessary.
function padDate(date) {
return date < 10 ? `0${date}` : date;
}
Special JS Feature/Syntax
The benchmark uses the let
keyword for variable declarations, which is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). This is likely used to take advantage of faster execution times due to the compiler optimizations enabled by this syntax.
Other Alternatives
If you wanted to write similar benchmarks using alternative approaches:
split()
and padDate()
, you could use a library like Moment.js or Luxon to manipulate dates.Date
objects, you could consider using the Intl.DateTimeFormat
API or a library like date-fns.Keep in mind that these alternatives might not offer significant performance improvements over the original implementation and may add additional dependencies or complexity.
Test Results
The latest benchmark results show that Chrome 108 on Windows Desktop achieved higher execution rates for both test cases. However, it's essential to analyze the results carefully to understand any potential issues or limitations with the testing environment.