<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
var a = null;
var b = undefined;
var c = NaN;
var d = false;
var e = 'a';
var f = 0;
if (_.isNil(a)) {}
if (_.isNil(b)) {}
if (_.isNil(c)) {}
if (_.isNil(d)) {}
if (_.isNil(e)) {}
if (_.isNil(f)) {}
if (a) {}
if (b) {}
if (c) {}
if (d) {}
if (e) {}
if (f) {}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
lodash isNil | |
native isNil |
Test name | Executions per second |
---|---|
lodash isNil | 841863.1 Ops/sec |
native isNil | 2580609.0 Ops/sec |
Let's dive into the explanation.
Benchmark Purpose:
The benchmark measures the performance difference between using Lodash's isNil
function and JavaScript's native NaN
(Not a Number) check for null and undefined values in an array of variables (a
, b
, c
, d
, e
, f
) with different data types.
Options Compared:
isNil
: This function checks if a value is null, undefined, or NaN.NaN
check: This method checks if a value is NaN, which can also be used to represent null or undefined in some cases.Other Considerations:
NaN
check may not cover all edge cases or corner scenarios like handling NaN with NaN (NaN !== NaN), but it is generally faster and more efficient.Library:
The Lodash library provides a set of functional programming helpers, including the isNil
function, which checks if a value is null, undefined, or NaN. The library also includes other useful functions for array manipulation, string processing, and more.
JavaScript Features/Syntax:
There are no special JavaScript features or syntaxes used in this benchmark that require explanation beyond the use of NaN to represent null or undefined values.
Alternatives: Other alternatives for handling null and undefined values could include:
?.
): Introduced in ECMAScript 2020, optional chaining allows you to access nested properties without throwing an error if the value is null or undefined.??
Null Coalescing Operator: This operator returns its right-hand operand if it's not null or undefined; otherwise, it returns the left-hand operand.Keep in mind that these alternatives might introduce additional overhead depending on the specific use case and performance requirements.