Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
lodash.isUndefined vs native check is undefined
(version: 0)
Comparing performance of:
Native vs Lodash
Created:
2 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.1/lodash.min.js"></script>
Script Preparation code:
var foo;
Tests:
Native
if (foo) { console.log(foo); }
Lodash
if (_.isUndefined(foo)) { console.log(foo); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Native
Lodash
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested. **Benchmark Description** The benchmark compares two approaches to check if a variable is undefined: using native JavaScript checks (`if (foo)`) versus using the `lodash.isUndefined` function from the Lodash library. **Native Check Approach** * **Purpose**: The native check approach uses the `if (foo)` syntax, which directly evaluates the value of the `foo` variable and logs its value to the console if it's truthy. * **Pros**: + Lightweight and straightforward + No external dependencies required + Easy to understand and implement * **Cons**: + May be slower due to the need for a conditional evaluation + May not work as expected in certain edge cases (e.g., null or undefined values) **Lodash isUndefined Function Approach** * **Purpose**: The Lodash `isUndefined` function checks if a value is undefined and returns a boolean result. In this benchmark, it's used to check the value of the `foo` variable. * **Pros**: + Faster than native checks due to optimized C++ implementation + More robust and reliable, handling edge cases like null or undefined values + Part of a popular and widely-used library * **Cons**: + Requires an external dependency (the Lodash library) + May be perceived as less "native" or "JavaScript-y" The benchmark provides two test cases: 1. Native: Evaluates the `foo` variable using a direct if-statement. 2. Lodash: Uses the `lodash.isUndefined` function to check the value of `foo`. **Device and Browser** The latest benchmark results show that Chrome 114 on a Mac OS X 10.15.7 device executes the native check approach 189,831,800 times per second, while the Lodash approach executes at 256,167,984 times per second. It's worth noting that these numbers are likely affected by various factors, including: * The specific implementation details of each approach * Optimizations or optimizations provided by Chrome and Lodash * Hardware and software characteristics of the device **Other Alternatives** If you were to rewrite this benchmark, you might consider exploring other approaches to check for undefined values, such as: * Using `typeof foo === 'undefined'` * Employing a more modern JavaScript feature like optional chaining (`?.`) or nullish coalescing (`??`) * Utilizing libraries or functions that provide more advanced type checking and handling However, it's essential to consider the trade-offs and pros/cons of each approach before selecting an alternative.
Related benchmarks:
Native Undefined vs Lodash isUndefined
lodash isFunction vs native
lodash isUndefined vs typeof === undefined (take 2)
isUndefined
Comments
Confirm delete:
Do you really want to delete benchmark?