[U-Boot] [PATCH 4/4] kbuild: improve Kbuild speed

[Simon Glass]

Hi,

On 27 February 2014 07:28, Masahiro Yamada <yamada.m at jp.panasonic.com>wrote:

> Kbuild brought about many advantages for us but
> a significant performance regression was reported by
> Simon Glass.
>
> After some discussions and analysis, it turned out
> its main cause is in $(call cc-option,...).
>
>
This significantly improves performance for me on snow:

$ time crosfw -b snow -w
Configuring for snow board...

real 0m5.023s
user 0m34.440s
sys 0m4.050s


Without this series it is:

$ time crosfw -b snow -w
Configuring for snow board...

real 0m26.440s
user 0m46.770s
sys 0m10.170s


Prior to kbuild going in I got:

time crosfw -b snow -w
Configuring for snow board...

real 0m5.923s
user 0m37.110s
sys 0m5.240s


So I would say that we are at least as fast as pre-kbuild. Great!

Regards,
Simon