Yeah. Not many new instructions but many instructions required less cycles per instruction and the 486 also got way bigger caches. And the integrated FPU (IIRC

Yeah. Not many new instructions but many instructions required less cycles per instruction and the 486 also got way bigger caches. And the integrated FPU (IIRC the FPU was an add-on for the 386). Switching from a 386 to a 486 was bringing a huge speedup back then.