Optimise installation

[chrisburr]

Currently the installer hasn't been optimised at all however once things are stable it should be adapted to minimise

• Compressed installer size
• Installation file count (and hence IO load)
• Installation time

The following might be helpful for this:

• Removing unused packages
• Using .conda packages instead of .tar.bz2
• Using micromamba instead of conda-standalone
• Modifying the packages themselves to split into smaller components or to avoid dependencies

Of course it's important that DIRACOS2 is still easy to build and maintain, even if that comes at a small cost.

[chrisburr]

Using .conda as the file format of the packages instead the installer instead of .tar.bz2 (#13) is a big help. The only downside is that building the installer is considerably slower (20 minutes vs 3.5 minutes). Locally this is less of an issue as the output of the "transmuting" process from .tar.bz2 to .conda is cached.

By default with .tar.bz2 packages the installer is 354 MB and takes:

________________________________________________________
Executed in   42.07 secs   fish           external
   usr time   73.87 secs  597.00 micros   73.87 secs
   sys time    7.36 secs   52.00 micros    7.36 secs

With .conda transmuting the installer is 247 MB and takes:

________________________________________________________
Executed in   28.24 secs   fish           external
   usr time   20.97 secs  539.00 micros   20.97 secs
   sys time    8.07 secs   47.00 micros    8.07 secs

[chrisburr]

Installing mysql-client instead of mysql saves another 21MB on the tarball and 75 MB installed.

[chrisburr]

As of DIRACOS v2.16 micromamba is now being used which speeds things up quite a bit (assuming the storage iops can handle it).