Just thought I would share my solution to having smooth(ish) window drag/movement on the ODROID-C1 with LXDE.
I initially looked at xcompmgr, although this has the effect of adding transparency, which does not fair well if you launch Kodi - teh video content also becomes transparent - so this was not the solution,
I went though various attempts to fix this - including installing metacity (this ha a compositor built in) the results of which were the same transparent Kodi content.
Same with Compton and others.
The fix was there at the start all along , to use xcompmgr, but with the -a flag "xcompmgr -a" this causes xcmpmgr to " Use automatic server-side compositing. Faster, but no special effects."
If you add "xcompmgr -a" in the composite section of LXDE then this should solve the issue of laggy windows, I also suspect , but yet to try that this will assist where a window manger is unusable due to being "too dark"
** EDIT1:
Stand-alone window mangers seem to prefer 'xcompmgr -n' tested on "openbox" and "JWM" - LXDE seems to prefer 'xcompmgr -a' not sure why.
Hope this helps
Jase