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Prepack

24
74
+ 1
3
Underscore

1.6K
581
+ 1
290
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Prepack vs Underscore: What are the differences?

What is Prepack? A tool for making JavaScript code run faster (by Facebook). Prepack is a partial evaluator for JavaScript. Prepack rewrites a JavaScript bundle, resulting in JavaScript code that executes more efficiently. For initialization-heavy code, Prepack works best in an environment where JavaScript parsing is effectively cached.

What is Underscore? JavaScript's utility _ belt. A JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.

Prepack and Underscore can be primarily classified as "Javascript Utilities & Libraries" tools.

Prepack and Underscore are both open source tools. It seems that Underscore with 24.6K GitHub stars and 5.41K forks on GitHub has more adoption than Prepack with 13.7K GitHub stars and 463 GitHub forks.

Decisions about Prepack and Underscore

Fast Healthcare Interoperability Resources (FHIR) provides standard data objects in JSON format for the healthcare industry. Since JSON objects are hierarchical and tree-like, we had a need to defensively 'pluck' fields from our JSON objects and do lots of mapping. We tried jQuery and Underscore and a few other technologies like FHIRPath; but Lodash has been the most well supported, works in the most contexts, has the cleanest syntax, etc. We particularly like the ES6 version of Lodash, where we can import the method names directly, without resorting to * or _ syntax. We got hooked on the 'get' function to defensively pluck fields from objects without crashing our user interface, and have found countless uses for the other lodash functions throughout our apps. Lodash is great for developing and optimizing algorithms.

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Pros of Prepack
Pros of Underscore
  • 1
    Available as NPM
  • 1
    Gulp package available
  • 1
    Easy setup but has a very limited range of use cases
  • 85
    Utility
  • 55
    Simple
  • 40
    Functional programming
  • 32
    Fast
  • 28
    Open source
  • 20
    Backbone
  • 16
    Javascript
  • 8
    Annotated source code
  • 6
    Library

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What is Prepack?

Prepack is a partial evaluator for JavaScript. Prepack rewrites a JavaScript bundle, resulting in JavaScript code that executes more efficiently. For initialization-heavy code, Prepack works best in an environment where JavaScript parsing is effectively cached.

What is Underscore?

A JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.

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What companies use Prepack?
What companies use Underscore?
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What tools integrate with Prepack?
What tools integrate with Underscore?

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What are some alternatives to Prepack and Underscore?
Webpack
A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows to load parts for the application on demand. Through "loaders" modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.
Closure Compiler
The Closure Compiler is a tool for making JavaScript download and run faster. It is a true compiler for JavaScript. Instead of compiling from a source language to machine code, it compiles from JavaScript to better JavaScript. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls.
Modernizr
It’s a collection of superfast tests or detects as we like to call them which run as your web page loads, then you can use the results to tailor the experience to the user. It tells you what HTML, CSS and JavaScript features the user’s browser has to offer.
Modernizr
It’s a collection of superfast tests or detects as we like to call them which run as your web page loads, then you can use the results to tailor the experience to the user. It tells you what HTML, CSS and JavaScript features the user’s browser has to offer.
Lodash
A JavaScript utility library delivering consistency, modularity, performance, & extras. It provides utility functions for common programming tasks using the functional programming paradigm.
See all alternatives