Any one tried to optimize the u boot , pre-loader and the kernel to make the boot up time shorter?? notice the bot up time quite slow... any suggestion?
not sure if you know what device that you are using, primitive way is to disable all the unused device and feature in the preloader, also from the device tree, maybe able to speed up. and also use qspi boot instead of sd card
there is a function to read the time stamp, you may consider to use this and deploy in several important boot area, identify the most time consuming area and try to strip the initialization from there to earn faster boot time.