@ Blacksimon

Performance 'increase' should be a measure of the difference between
swapping to hdd and swapping to zram.

If your Knoppix can handle everything you need with 1 Gb, then
zram in Knoppix 7 will stay out of the way and not affect performance
at all.

If you need more than 1 Gb, presumably your system will hang up
without zram, unless you have some other swap to save you.
This is where Knoppix's zram comes to the rescue. Not crashing
is the performance increase in this case.

Just trying to clarify things, hope this helps.