<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>
var x = [1,2,3]
_.flatMap(x,x => [x-1, x, x+1])
x.flatMap(x => [x-1, x, x+1])
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
lodash.flatMap | |
native |
Test name | Executions per second |
---|---|
lodash.flatMap | 7076179.0 Ops/sec |
native | 6466161.5 Ops/sec |
I'll break down the provided JSON and explain what's being tested.
Benchmark Definition
The benchmark definition is a JSON object that describes two test cases:
flatmap: lodash vs native
: This is the main test case, which compares the performance of the flatMap
function from the Lodash library (a popular JavaScript utility library) to the equivalent native implementation in JavaScript.lodash.flatMap
: This variation uses the flatMap
function from the Lodash library, passing a callback function that takes an element x
and returns an array of transformed elements [x-1, x, x+1]
.native
: This variation uses a native JavaScript implementation of the flatMap
function. The code is not explicitly provided in the benchmark definition JSON, but it's assumed to be equivalent to the Lodash version, except for the use of the Lodash library.Options Compared
The two test cases compared are:
Library Used: Lodash
Lodash is a popular JavaScript utility library that provides a wide range of functions for common tasks, such as array manipulation, string manipulation, and functional programming helpers. The flatMap
function in this benchmark is part of the Lodash library.
The purpose of using a library like Lodash is to provide a convenient way to perform common operations without having to write boilerplate code. However, this can also lead to performance overhead due to the additional dependency and the potential complexity of the implementation details.
Special JS Feature/Syntax: Native flatMap
Implementation
Note that there is no special JavaScript feature or syntax explicitly mentioned in the benchmark definition JSON. The focus is on comparing the performance of the Lodash library vs a native JavaScript implementation.
However, it's worth noting that some modern JavaScript engines, such as V8 (used by Chrome), have optimized implementations for certain functional programming constructs like flatMap
. These optimizations can lead to improved performance without affecting the syntax or semantics of the code.
Other Alternatives
If you're interested in exploring alternative approaches, here are a few options:
flatMap
, such as using a different programming paradigm (e.g., using a recursive approach instead of an iterative one).