What are some strategies for shrinking the size of an Angular JS application when the vendor.js file is 2MB and the app.js file is 720

I've been working on a web application using AngularJS. After using uglify and minify, I ended up with vendor.js and app.js files that are quite large - 2 MB and 720KB, respectively. When checking Chrome Dev Tools, I noticed that they took 25s and 14s to download, which seems like a significant amount of time even on my 100MBPS internet connection. I'm concerned about the customer experience for those with slower connections. Are there any techniques or tools available to compress or reduce the size of these files? I understand that breaking down vendor.js might not be feasible since Angular requires all of it on the first page.

Answer №1

To achieve significant performance improvements, it is crucial to serve files with gzip compression and utilize a CDN such as cloudfront or akamai. CDNs often deliver files from servers physically closer to the user, resulting in faster downloads. Enabling gzip on a CDN can greatly reduce file sizes, leading to better loading times.

Another optimization technique to consider is tree-shaking, which involves removing unused code from your javascript bundles like app.js and vendor.js. While implementing this may require some refactoring, tools like webpack make it manageable.

Additionally, adopting lazy loading can enhance user experience by loading only necessary code as users navigate through different sections of the application. ocLazyLoad is a popular choice for implementing lazy loading, particularly for versions 1.x onwards:

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