From my limited understanding, changing to a smaller process node can (doesn't have to, can get worse) result in transistor switching occurring faster. That can and has resulted in a microcode instruction that used to take say 2 cycles to complete, to take 1 cycle.
The processor's process size is always something that's frequently discussed in the chip's specifications. But what is that, and why does it matter? Let's check it out.
www.maketecheasier.com
"Smaller processes also have a lower capacitance, allowing transistors to turn on and off more quickly while using less energy. And if you’re trying to make a better chip, that’s perfect. The faster a transistor can toggle on and off, the faster it can do work. "