var noarr = 5555
var array = [1,2,3,4,5]
var array2 = [[1,2],[3,4],[5,6]]
const f1 = [noarr].flat(1)
const f2 = [array].flat(1)
const f3 = [array2].flat(1)
const n1 = Array.isArray(noarr) ? noarr : [noarr]
const n2 = Array.isArray(array) ? array : [array]
const n3 = Array.isArray(array2) ? array2 : [array2]
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Array.flat | |
isArray check |
Test name | Executions per second |
---|---|
Array.flat | 76484.1 Ops/sec |
isArray check | 230601.9 Ops/sec |
Let's break down the benchmark and explain what's being tested.
Benchmark Overview
The benchmark compares two approaches:
Array.flat()
: This method is used to flatten an array of arrays into a single array.isArray check
(a shorthand way to check if an element is an array using Array.isArray()
)Options Compared
The benchmark tests the performance of both options under the same input data.
Pros and Cons of Each Approach:
Array.flat()
isArray check
in some cases, especially when dealing with shallow arrays.isArray check
Array.isArray()
).Library/Functionality:
In this benchmark, no external library is used. The Array.flat()
and Array.isArray()
functions are part of the JavaScript standard library.
Special JS Feature/Syntax:
No special JavaScript feature or syntax is being tested in this benchmark. Both options rely on basic array operations.
Other Considerations:
Array.flat()
and isArray check
ultimately depends on the specific requirements of your use case.Alternative Approaches:
For more complex array manipulation tasks or performance-critical code paths, other approaches may be worth considering:
_.flatten()
) for more comprehensive array flattening capabilities.Array.flat()
or Array.isArray()
.Uint8Array
or other specific types.Keep in mind that these alternatives may introduce additional complexity, trade-offs, or performance overhead.