You can get like embedded Linux systems to boot you know well under a second.
你可以像嵌入式Linux系统一样引导你熟悉的不到一秒钟的时间。
英语百科
Linux on embedded systems
Operating systems based on the Linux kernel are used in embedded systems such as consumer electronics (i.e. set-top boxes, smart TVs, in-vehicle infotainment (IVI), networking equipment (such as wireless routers), machine control, industrial automation, navigation equipment, spacecraft flight software, and medical instruments in general).