<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
var x = 4060
for (var i = 0; i < 1000; i++) {
_.round(x, -2);
}
for (var i = 0; i < 1000; i++) {
Math.round(x/100) * 100;
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Round floating number using lodash | |
Round floating number using toFixed() |
Test name | Executions per second |
---|---|
Round floating number using lodash | 5037.0 Ops/sec |
Round floating number using toFixed() | 246395.9 Ops/sec |
Let's break down the provided benchmark and its components.
Benchmark Overview
The benchmark is designed to compare two approaches for rounding numbers: lodash.round
and Math.round
with toFixed()
. The goal is to measure which approach is faster for rounding a number to 2 decimal places.
Options Compared
Two options are being compared:
lodash.round
: A function from the Lodash library that rounds a number to a specified precision. In this case, it's rounded to -2 (which means rounding to 2 decimal places).Math.round
with toFixed()
: This approach uses the Math.round()
function to round the number and then applies toFixed(2)
to format the result as a string with exactly 2 decimal places.Pros and Cons
lodash.round
:Math.round
with toFixed()
:Library: lodash
Lodash is a popular utility library for JavaScript that provides a wide range of functions for various tasks, such as array manipulation, string templating, and more. In this benchmark, the _.round
function is used to perform rounding.
Special JS Feature/Syntax: None
There are no special JavaScript features or syntax being tested in this benchmark.
Other Alternatives
If you were to modify the benchmark to compare other approaches, here are some alternatives:
Number.prototype.round()
instead of Math.round
.Decimal.js
.Keep in mind that when modifying the benchmark, you'll need to consider factors like compatibility, performance, and maintainability.
I hope this explanation helps!