An expert, Andrew Murray, managed to get Linux booting in 0.39 seconds, 1 second into a Qt-based dashboard with live video streaming! Using an MS7724 development board, UBoot, Linux Kernel 2.6.31-rc7, and Qt Embedded Open Source 4.6.2. However, that alone did not do the job all by itself, the expert spent time on understanding the whole boot process bit by bit, tracked down the delaying parts, and optimized them! Wonderful work!
Here’s a detailed video:
He also provided a slideshow that demonstrates his approach to this minimal boot time to the public!
Andrew Murray has earned my respect.