As the article points out, every modern OS clears (main) memory before handing it over to a new process. The cost is often mitigated a bit by using spare CPU cycles to zero out free pages, and by keeping a buffer of such pages. You only need to pause to zero pages if you have sustained 100% CPU usage for a <i>long</i> time - and that&#x27;s pretty rare on most machines. GPUs probable even more so.<p>GPUs generally have less memory, many fewer (but larger) allocations, and <i>way</i> higher memory bandwidth than CPUs, so it shouldn&#x27;t be a problem for them to do this.