I noticed that SED gets slow after 10-15 minutes of working.
Scrolling and typing gets a lag up to a second, screen redraw after alt+tab into the SED window gets also very slow.

On a XP 32bit machine with nearly the same comfiguration (i.e. Hardware, installed software) everything works fine.
SED does not take more memory or cpu load measured with perfmon.msc over time.
If I close SED and restart it everything works fast again.

Anyone else experiencing this problem ?