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Prepack

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Prepack vs SockJS: What are the differences?

  1. Compilation Approach: Prepack is a tool that performs code optimization through partial evaluation and simplification whereas SockJS is a client-side JavaScript library for creating WebSocket connections and fallback mechanisms.
  2. Main Purpose: Prepack focuses on optimizing JavaScript code, reducing its size, and improving runtime performance, while SockJS primarily aims to provide a consistent WebSocket interface across different browsers and fallback mechanisms in case WebSocket is not supported.
  3. Integration: Prepack is typically integrated as part of the build process to optimize JavaScript code before deployment, while SockJS is directly used in the client-side code to establish WebSocket connections.
  4. Scope: Prepack optimizes and simplifies JavaScript code in its entirety, whereas SockJS specifically focuses on communication over WebSocket connections in web applications.
  5. Output: The output of Prepack is optimized JavaScript code ready for deployment, whereas SockJS enables the establishment of WebSocket connections and handles fallback mechanisms seamlessly.
  6. Performance Impact: Prepack can significantly improve the runtime performance of JavaScript applications by optimizing code, while SockJS provides a reliable way to maintain WebSocket connections and fallback mechanisms, potentially impacting the overall performance and user experience of a web application.

In Summary, Prepack is a tool for optimizing JavaScript code, while SockJS is a library for managing WebSocket connections in web applications.

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Pros of Prepack
Pros of SockJS
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    Available as NPM
  • 1
    Gulp package available
  • 1
    Easy setup but has a very limited range of use cases
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    - No public GitHub repository available -

    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 SockJS?

    It gives you a coherent, cross-browser, Javascript API which creates a low latency, full duplex, cross-domain communication channel between the browser and the web server, with WebSockets or without.

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    What companies use Prepack?
    What companies use SockJS?
    See which teams inside your own company are using Prepack or SockJS.
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    What tools integrate with Prepack?
    What tools integrate with SockJS?
      No integrations found
      What are some alternatives to Prepack and SockJS?
      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