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Lodash isString fork
(version: 0)
Comparing performance of:
_lodash vs native vs index
Created:
3 years ago
by:
Guest
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HTML Preparation code:
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>
Script Preparation code:
const a = 'Hello world!'
Tests:
_lodash
_.isString('Hello world!')
native
typeof 'Hello world!' === "string" ? true : false
index
3 === 0
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
_lodash
native
index
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested. **Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question tests the performance of different approaches to determine whether a string is "isString" (i.e., not null or undefined) using two main methods: Lodash's `_.isString` function and a native JavaScript approach. **Benchmark Definition JSON** The JSON represents three test cases: 1. `"_.isString('Hello world!')"`: This test case uses Lodash's `_.isString` function to check if the string `'Hello world!'` is "isString". 2. `"typeof 'Hello world!' === \"string\" ? true : false"`: This test case uses a native JavaScript approach to check if the string `'Hello world!'` is of type "string" using the `typeof` operator. 3. `"3 === 0"`: This test case simply checks for equality between two numbers, which serves as a baseline or warm-up test. **Lodash's _.isString function** The `_` symbol in Lodash refers to the root namespace, and `_.isString` is a utility function that returns a boolean indicating whether its argument is a string. In this case, the function is called with the string `'Hello world!'`, which is expected to return true. **Native JavaScript approach** The native JavaScript approach uses the `typeof` operator to check if the variable or expression has a type of "string". The expression `typeof 'Hello world!' === \"string\" ? true : false` first checks if the result of `typeof` is equal to `"string"`. If it is, the expression returns true; otherwise, it returns false. **Pros and Cons** 1. **Lodash's _.isString function**: * Pros: Convenient and concise way to check for strings using a single function call. * Cons: Adds an additional dependency (Lodash) and may introduce overhead due to the function call and object lookup. 2. **Native JavaScript approach**: * Pros: No dependencies, no function call overhead, and straightforward syntax. * Cons: Requires manual string checking with `typeof` or other methods. **Considerations** When choosing between these approaches, consider the trade-offs: * If you need a simple and convenient way to check for strings, Lodash's `_isString` function might be the better choice. However, if you're looking for a lightweight solution without dependencies, the native JavaScript approach is a good alternative. * If you're working with complex data types or need more advanced string manipulation capabilities, consider using other Lodash functions like `_.toString()` or `_.toLowerCase()`. **Other alternatives** If you want to explore additional approaches, here are some options: 1. **String.prototype.toString()**: This method can be used as a fall-back for older browsers that don't support the `typeof` operator with the `"string"` type. 2. **regex-based approach**: You could use a regular expression to check if the string matches the pattern of a string, but this might be overkill for simple cases and would likely add complexity. Keep in mind that these alternatives may not provide the same level of convenience or performance as Lodash's `_isString` function or the native JavaScript approach.
Related benchmarks:
isEmpty vs. vanilla
empty arr
Lodash isString
isUndefined
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