Important disclamer
While this was a nice PoC from my point of view, I never maintained this module. Please use mature solutions instead such as https://github.com/makinacorpus/drupal-gulpifier or https://www.drupal.org/project/advagg instead.
Original module summary
THIS MODULE IS NOT DRUPAL CORE: it provides some CSS and JS file handling replacement FOR core. Please stop filing issues for core bugs in here.
This module changes the Drupal core aggregation mecanism process. It greatly reduces I/O and aggregated number of files, and improves chances of client cache hit, therefore while it produces bigger aggregated files, it reduces greatly the bandwidth utilization while users browse.
This is achieved by bypassing the dynamic CSS and JS inclusion. Instead of including and aggregating only needed files on a per-page basis, it learns files being used site-wide while user browse, then is able to produce larger therefore more revelant files that aggregate all those atomic files whether or not they are being used on the page.
Over time, the number of aggregated files reduce to achieve a stable state where all site JS files are being aggregated in one file only, and all site CSS are being aggretated in only two files (libraries into one side, theme files into another, can be more if there are browser-specific files).
DDEV is the official local development tool of Drupal. And like Drupal, DDEV depends on the support of the open source community.
