Performance problem with the on-the-fly minification

Problem/Motivation

Using drupal 10.1.5, each back-office page takes up to 10 seconds to load.
After a few research, I found that the problem comes from the on-the-fly minification implemented in #3302755: On-the-fly JavaScript minification.

You may think that this occurs only once and then the javascript is loaded from the disk.
But in reality, as each back-office page uses differents library, the loading time occurs again and again when you go through the back-office.

Consequently, at the moment the back-office is mostly unusable until the core javascript aggregation is disabled.

I attached a screenshot taken from xhprof so you can see how many time takes the on-the-fly minification for 75 javascripts files (from core and contrib only, no custom modules).

Steps to reproduce

1. Install Drupal 10.1.5
2. Ensure the core javascript aggregation is enabled
3. Display a back-office page
4. See that the loading time is really slow (might be slower on a project with multiple modules enabled)

Proposed resolution

I looked at the issue #3308122: Pre-minify core JavaScript which should solve the problem in the end, but I'm not sure this can wait until then.

You may want to rollback #3302755: On-the-fly JavaScript minification and deliver the whole feature #3302755: On-the-fly JavaScript minification + #3308122: Pre-minify core JavaScript at once.