Tvheadend

Hi,

Due to frequent channel shuffle on european satellites and tvheadend's not very user-friendly interface for bulk channel changes, I'm working on a script that will automatically map channels with numbers and assign tags to them.
In the script, I need to read all the services from the tvheadend config folder. I found that I have mix of folders and files in input/dvb/networks/<network>/muxes/. It's easy with folders (<mux>/services), but it's harder to read the bundled files.

So, the question is what's the status of the bundling?
Which compression algorithm is used there?
Are there any pros/cons to use bundling/bundling with compression vs plain files?
If I disable bundling and compression, are there any other parts of the system that will be affected?