Re: Test CMake build

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От Teodor Sigaev
Тема Re: Test CMake build
Дата
Msg-id 56BDCCE9.8010507@sigaev.ru
обсуждение исходный текст
Ответ на Re: Test CMake build  (Teodor Sigaev <teodor@sigaev.ru>)
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Teodor Sigaev wrote:
> I tried it on FreeBSD 64-bit, 16Gb, SSD, Core i7
>
> ( ./configure && gmake all; )  168,99s user 15,46s system 97% cpu 3:09,61 total
> ( cmake . && gmake all; )  75,11s user 11,34s system 100% cpu 1:26,30 total
( CFLAGS='-O2' cmake . && gmake all; )  141,87s user 12,18s system 97% cpu
2:37,40 total

Oops, cmake default target is compiled with -O0. With -O2 cmake is still faster
but not so much.

>
> Cmake 2 times faster, that is good, but I don't understand why. Which
> optimization level does cmake buld use by default? Which compiler does it take?
> It's not obvious, because cmake build hides actual compiler command line.
>
> Yury, pls, return back check target...

--
Teodor Sigaev                                   E-mail: teodor@sigaev.ru
                                                    WWW: http://www.sigaev.ru/


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