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Date: Thu, 16 Nov 2017 09:10:16 +0900 From: Masahiro Yamada <yamada.masahiro@...ionext.com> To: Linux Kbuild mailing list <linux-kbuild@...r.kernel.org> Cc: Douglas Anderson <dianders@...omium.org>, Sam Ravnborg <sam@...nborg.org>, Michal Marek <michal.lkml@...kovi.net>, Masahiro Yamada <yamada.masahiro@...ionext.com>, Michal Marek <mmarek@...e.com>, X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, Andy Lutomirski <luto@...capital.net>, Ingo Molnar <mingo@...hat.com> Subject: Re: [PATCH v2 0/6] kbuild: optimize output directory creation 2017-11-13 19:29 GMT+09:00 Masahiro Yamada <yamada.masahiro@...ionext.com>: > > I looked into the build scripts, focusing on "mkdir" optimization. > > With this series, I succeeded in speeding up the incremental build > with O= option. > > The following is the result of "time make O=foo", > where "foo" is the output directory that has already been built. > > Before: > > real 0m8.322s > user 0m4.324s > sys 0m1.220s > > After: > > real 0m6.989s > user 0m4.168s > sys 0m1.080s > > 4/6 gave the biggest impact. > > Series, applied to linux-kbuild/kbuild. -- Best Regards Masahiro Yamada
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