Benchmark: Lodash isString - MeasureThat.net

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

Historical Performance Data aggregated from 19 community runs

Desktop Results:

Chrome 19 runs

native

166.6M/s

_lodash

18.3M/s

Fastest: native (9.1x faster)

View exact numbers

✓ native: 166,553,648 ops/sec
• _lodash: 18,304,856 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_lodash
native

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Mac OS X 10.15.7

View result in a separate tab

native

231.0M/s

_lodash

207.2M/s

View exact numbers

Test name	Executions per second
✓ native	230,955,120 Ops/sec
_lodash	207,245,696 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided benchmark.

**Benchmark Definition JSON**

The provided JSON represents a benchmark for testing the performance of two approaches: using Lodash's `isString` function and a native JavaScript approach using `typeof`.

The main components of the benchmark definition are:

* **Script Preparation Code**: This is the code that needs to be executed before running each test case. In this case, it simply assigns the string "Hello world!" to a variable named `a`.
* **Html Preparation Code**: This is the HTML code that needs to be included in the page before running each test case. It includes a script tag that loads the Lodash library.
* **Benchmark Definition**: This specifies the actual benchmarking code that will be executed. There are two benchmark definitions:
	+ The first one uses the `_.isString` function from Lodash, passing the string "Hello world!" as an argument.
	+ The second one uses a native JavaScript approach: it checks if the type of "Hello world!" is equal to "string" using the ternary operator.

**Options Compared**

The two options compared in this benchmark are:

* **Lodash's `isString` function**: This function takes a value as an argument and returns a boolean indicating whether the value is a string.
* **Native JavaScript approach using `typeof`**: This approach uses the `typeof` operator to check if the type of "Hello world!" is equal to "string". If it is, it returns true; otherwise, it returns false.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash's `isString` function**:
	+ Pros:
		- This approach is more concise and readable.
		- It is a part of the Lodash library, so you don't need to define it yourself.
	+ Cons:
		- You need to include the entire Lodash library in your page, which can increase the page load time.
* **Native JavaScript approach using `typeof`**:
	+ Pros:
		- This approach is more efficient since it doesn't require loading an external library.
	+ Cons:
		- It requires you to define the logic yourself, which can make the code less readable.

**Library**

The Lodash library is a popular utility library for JavaScript that provides various functions for tasks such as string manipulation, array processing, and more. In this benchmark, Lodash's `isString` function is used to check if a value is a string.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax mentioned in the provided code. However, it's worth noting that some modern browsers support features like arrow functions (`=>`) and template literals (`${}`), which are not used in this benchmark.

**Other Alternatives**

If you want to test other approaches, you could consider the following alternatives:

* Using a different string manipulation function from Lodash (e.g., `_.toString()`).
* Using a different type checking approach (e.g., using `===` instead of `typeof`).
* Testing the performance of different JavaScript engines or implementations (e.g., V8 vs. SpiderMonkey).

Lodash isString (version: 0)

Comparing performance of: `_lodash vs native`

Created: 5 years ago by: Guest

Go to the latest result

_lodash

native

Historical Performance Data aggregated from 19 community runs

Desktop Results:

Chrome 19 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Lodash isString (version: 0)

Comparing performance of: _lodash vs native

Created: 5 years ago by: Guest

Go to the latest result

_lodash

native

Historical Performance Data aggregated from 19 community runs

Desktop Results:

Chrome 19 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Related benchmarks

Comparing performance of: `_lodash vs native`