let num = 500;
let nums = [];
for(let i = 0; i < 100; ++i) {
nums.push(String(num));
}
let num = 500;
let nums = [];
for(let i = 0; i < 100; ++i) {
nums.push(num.toString());
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
String() | |
.toString() |
Test name | Executions per second |
---|---|
String() | 330079.6 Ops/sec |
.toString() | 657672.7 Ops/sec |
Let's break down the provided benchmark and explain what's being tested, compared, and their pros and cons.
Benchmark Overview
The benchmark compares two approaches to convert a number num
to a string: using the String()
function versus using the .toString()
method. The test creates an array nums
and pushes either converted values from both methods into it 100 times.
Options Compared
String(num)
: This approach uses the built-in String()
function to convert the number num
to a string..toString()
: This approach uses the .toString()
method, which is also a built-in method in JavaScript.Pros and Cons
String(num)
:.toString()
..toString()
:String(num)
.The choice between these two approaches often comes down to personal preference, readability, and the specific use case. If performance is critical and you're working with numbers, String(num)
might be a better choice. However, if you need more explicit conversion control or are dealing with non-numeric values, .toString()
could be the way to go.
Library Use
Neither of these approaches uses a library in the provided benchmark. The built-in String()
function and .toString()
method are part of the JavaScript language itself.
Special JS Feature/Syntax
There is no special JavaScript feature or syntax used in this benchmark beyond what's inherent to the language.
Other Alternatives
If you wanted to explore other approaches, here are some alternatives:
lodash
(in particular, its toNumber()
method) or util
module (in Node.js) for string conversion.String()
function or .toString()
, you could use template literals (the backtick syntax: `` `${expression}``` ) to create a new string.parseInt()
/parseFloat()
, Number()
, or even using regular expressions.The String()
function and .toString()
method remain popular choices due to their simplicity, readability, and performance.