<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
var x = 5.236;
for (var i = 0; i < 1000; i++) {
_.round(x,2);
}
for (var i = 0; i < 1000; i++) {
x.toFixed(2);
}
for (var i = 0; i < 1000; i++) {
parseFloat(x.toFixed(2));
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Round floating number using lodash round function | |
Round floating number using toFixed() | |
Round floating number using toFixed() and parseFloat |
Test name | Executions per second |
---|---|
Round floating number using lodash round function | 3246.6 Ops/sec |
Round floating number using toFixed() | 17447.3 Ops/sec |
Round floating number using toFixed() and parseFloat | 12003.8 Ops/sec |
Let's break down the provided JSON and explain what's being tested, compared, and the pros/cons of each approach.
Benchmark Definition
The benchmark is comparing three approaches to rounding floating-point numbers:
_.round(x, 2)
using the Lodash libraryx.toFixed(2)
parseFloat(x.toFixed(2))
Lodash Library
The Lodash library is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string normalization, and more. The round
function in particular is used to round numbers to a specified number of decimal places.
Options Comparison
Here's a brief comparison of the three approaches:
.round(x, 2)
(Lodash): This approach uses the Lodash library's round
function to round the floating-point number x
to 2 decimal places. The pros include:x.toFixed(2)
: This approach uses the toFixed()
method on the x
variable to format it as a string with 2 decimal places. The pros include:parseFloat(x.toFixed(2))
: This approach first formats x
as a string with 2 decimal places using toFixed()
and then converts it back to a float using parseFloat()
. The pros include:Special JavaScript Feature
There is no special JavaScript feature or syntax mentioned in this benchmark. All three approaches rely on standard JavaScript methods and libraries.
Other Alternatives
If you want to explore alternative rounding strategies, consider:
Keep in mind that the choice of rounding approach depends on the specific requirements and constraints of your project.