Heating and cooling, just like what causes cracks in sidewalks. Fast heating and cooling is worse than slow but there is also electromigration which will incre

Heating and cooling, just like what causes cracks in sidewalks. Fast heating and cooling is worse than slow but there is also electromigration which will increasingly become an issue as our process nanometer size decreases. My friend who majored in CS said his teacher recommended always leaving computers on.