var strings = [Array(1000).keys()].map(i => '' + i)
var joined = strings.join(',')
var reduced = strings.reduce((acc, cur) => acc + ',' + cur)
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
join | |
reduce |
Test name | Executions per second |
---|---|
join | 57503.2 Ops/sec |
reduce | 50263.1 Ops/sec |
Let's break down the benchmark and explain what's being tested.
Benchmark Overview
The benchmark compares the performance of two ways to concatenate an array of strings in JavaScript: join()
and reduce()
. The test creates an array of 1000 string elements, ranging from 0 to 999, and then uses each method to concatenate all the strings into a single string.
Options Compared
Two options are compared:
join()
: This method takes an array of strings as input and returns a new string with all the strings concatenated together using a separator (in this case, a comma).reduce()
: This method takes a callback function as input, which is applied to each element in the array. The callback function takes two arguments: the accumulator (initially set to an empty string) and the current element.Pros and Cons
Here are some pros and cons of each approach:
join()
:reduce()
:join()
Library
None.
Special JS Features or Syntax
There are no special JavaScript features or syntax being tested in this benchmark.
Other Alternatives
Two other alternatives could be used instead of join()
and reduce()
, depending on the specific use case:
Array.prototype.concat()
: This method concatenates two arrays into a new array, which can then be converted to a string using toString()
or another concatenation method.String.prototype.repeat()
: This method repeats a string a specified number of times and returns a new string containing all the repeated strings.In summary, this benchmark compares the performance of two common ways to concatenate arrays of strings in JavaScript: join()
and reduce()
. While join()
is simple and fast, it may require additional separators, whereas reduce()
provides more flexibility but can be less intuitive.