Let's dive into the world of JavaScript microbenchmarks.

Benchmark Definition

The benchmark is designed to compare three approaches:

1. Lodash: A popular JavaScript utility library that provides various functions, including omit, for working with objects.
2. Native Destructuring: The native JavaScript syntax for destructuring objects, which allows us to extract specific properties from an object while ignoring others.
3. Manual Omit: A custom approach where we create a new object with only the desired properties.

Options Compared

We're comparing the performance of each approach on a large dataset of 100,000 objects. The benchmark measures the time it takes to execute each approach using the map function on this dataset.

Pros and Cons of Each Approach

1. Lodash: Pros:
   • Convenient and easy to use.
   • Provides a well-maintained and widely adopted library for common tasks. Cons:
   • Introduces additional overhead due to the library's functionality and parsing.
2. Native Destructuring: Pros:
   • Native to JavaScript, so no additional overhead from a library.
   • Efficient and concise syntax. Cons:
   • Requires a basic understanding of destructuring syntax, which might not be familiar to all developers.
3. Manual Omit: Pros:
   • No external dependencies or overhead.
   • Allows for customization and control over the resulting object structure. Cons:
   • More verbose and requires manual handling of property names.

Library - Lodash

Lodash is a popular JavaScript utility library that provides various functions, including omit, for working with objects. The omit function takes two arguments: the object to be modified and an object containing properties to remove from the original object. In this benchmark, we're using the lodash.min.js file from a CDN.

Special JS Feature/Syntax - Native Destructuring

Native destructuring is a syntax feature introduced in ECMAScript 2018 (ES10) that allows us to extract specific properties from an object while ignoring others. The syntax is similar to array destructuring, but applied to objects. In this benchmark, we're using native destructuring with the const declaration and rest parameter (...rest) to achieve a similar effect to Lodash's omit function.

Benchmark Preparation Code

The script preparation code creates an empty array arr and an object object with various properties, including some that we want to omit in the benchmark. The code then pushes this object 100,000 times into the arr array using a loop.

Html Preparation Code

The HTML preparation code includes a script tag pointing to Lodash's CDN file, which is used by the benchmark.

Other Alternatives

If you're interested in exploring alternative approaches or testing other libraries, here are some options:

1. ES6 Object Rest Syntax: This syntax allows us to extract properties from an object while ignoring others using the rest parameter (...rest) and destructuring assignment ({ ...rest }).
2. JSON Path: A library that provides a way to query and manipulate JSON data, which could be used as an alternative to Lodash's omit.
3. Other JavaScript libraries or frameworks: Depending on your specific use case, you might find other libraries or frameworks that offer similar functionality to Lodash's omit, such as Ramda, Moment.js, or React.

Keep in mind that each approach has its pros and cons, and the choice of which one to use depends on your specific requirements and performance constraints.