Benchmark: lodash pick vs omit v2

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@3.10.0/index.min.js"></script>

Script Preparation code:

var a = {
  foo: "foo",
  bar: "loo"
};

Tests:

omit
_.omit(a, "bar")
pick
_.pick(a, "foo")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
omit
pick

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark is comparing two methods of Lodash (a popular utility library for JavaScript): `_.pick()` and `_.omit()`. Both methods are used to create a new object with specific properties from an existing object, but in opposite directions.

* `_.pick()` creates a new object that only includes the specified properties from the original object.
* `_.omit()` creates a new object that excludes the specified properties from the original object.

**Script Preparation Code**

The script preparation code defines an object `a` with two properties: `foo` and `bar`, containing values `"foo"` and `"loo"`, respectively. This object will be used as the input for both `_.pick()` and `_.omit()` methods.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the Lodash library (version 3.10.0) from a CDN. This ensures that the `_.pick()` and `_.omit()` methods are available in the benchmark.

**Individual Test Cases**

There are two test cases:

1. **_pick()**: Tests how fast `_.pick(a, "foo")` is compared to other approaches.
2. **_omit()**: Tests how fast `_.omit(a, "bar")` is compared to other approaches.

**What's being tested?**

In essence, the benchmark is comparing two different methods of object manipulation:

* Using Lodash's `_.pick()` method to create a new object with specific properties.
* Using Lodash's `_.omit()` method to create a new object with all but specified properties.

The benchmark is testing how fast each approach is executed, taking into account various factors such as browser, device platform, operating system, and execution frequency per second.

**Options being compared**

While the benchmark doesn't explicitly mention other options, we can infer that it might be comparing:

* `_.pick()` vs. manual object creation using `{ foo: "foo" }`
* `_.omit()` vs. manual object creation using `{ bar: "loo" }` (assuming the original object has all properties except `bar`)
* Other approaches that don't use Lodash's `_.pick()` and `_.omit()` methods, such as using array filters or other custom solutions

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash (`_.pick()` and `_.omit()`)**: Pros:
	+ Easy to use and concise syntax
	+ Fast execution due to optimized internal algorithms
	Cons:
	+ May have performance overhead due to library dependencies
* **Manual object creation**:
	+ Pros:
		- No external dependency, potentially faster execution
		- More control over implementation details
	+ Cons:
		- Requires more code and complexity
		- Error-prone if not implemented correctly

**Library: Lodash**

Lodash is a popular utility library for JavaScript that provides a set of high-order functions (functions that take other functions as arguments) to manipulate data. `_.pick()` and `_.omit()` are two such functions that create new objects with specific properties or exclude specified properties, respectively.

**Special JS feature or syntax?**

No special features or syntax are mentioned in this benchmark. The focus is on comparing the performance of Lodash's `_.pick()` and `_.omit()` methods against manual object creation approaches.

Other alternatives

If you're interested in exploring other approaches for creating objects with specific properties, here are some alternatives:

* Using array filters to create a new object: `Object.fromEntries(Object.entries(a).filter(([key]) => key === "foo"))`
* Using destructuring to extract properties from an object: `{ ...a, foo }`
* Using a custom implementation using loops and conditional statements

Keep in mind that each approach has its pros and cons, and the best choice depends on your specific use case, performance requirements, and personal preference.

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Windows

View result in a separate tab

Test name	Executions per second
omit	4844762.0 Ops/sec
pick	7931115.0 Ops/sec

Related benchmarks:

lodash pick vs omit v2 (version: 0)

Comparing performance of: omit vs pick

Created: 4 months ago by: Guest

Jump to the latest result

omit

pick

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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