Plasma is programmed with great care for saving resources. For example clocks only occupy the processor once a minute(when the displayed time changes). This is working well as I could just find out when I resumed my computer. The clock was still at the time from 2 hours ago when I suspended. Until about 20 seconds later, with a change in the minute, the time was displayed correctly again. This confirms how well this already works in plasma with KDE 4.1b2.
Related Posts : kde, plasma