Does enabling the Driver Model makes the boot slower ?

[Abder]

Hi,

Recently I have worked on porting an imx6 based board's u-boot2014 to u-boot2020
and I enabled all the used drivers to use DM: GPIO, ETH, USB, SPI,
MMC, WDT, MTD and REGULATOR.

However, I noticed that the boot of the new u-boot is somehow slower
than the old one (not by much though) !  Personally, I wouldn't expect
it to go as fast as the old one nor faster, as the driver model does
more device management than legacy drivers and also each DM
initialization requires some fdt nodes searching.

I would like to know your opinion on this, if this is mainly due to
using the driver model ? And eventually, if by using legacy drivers
could it make the boot faster than what we've got right now ?

Thank you.

Best regards
--
Abder