true, some skins and/or builds slow things down - a price to pay for most of the exotic ones.

i used superbox with a skin that was good and fast, but has given it up.

now, back to good old simple confluence - clean and fast.
just to share, for those who are concerned with memory space, this is my current build:

.. kodi 16.1
.. confluence skin
.. oblivion streams
.. project cypher
.. mr network tv
.. bbts
.. icdrama
.. made in canada
.. exodus
.. phoenix
.. quasar

this build came to 680MB, works well.

can copy and paste org.xbmc.kodi to any other android to get same build.