On 21/01/2014 13:56, Andre Fischer wrote: > On 21.01.2014 09:25, Issac Goldstand wrote: >> On 21/01/2014 10:09, Andre Fischer wrote: >>> On 21.01.2014 08:57, Andre Fischer wrote: >>>> Yesterday I was asked whether the use of precompiled headers had any >>>> benefit on the compilation speed. I thought the answer would be yes >>>> but I was not sure. So I did some tests. And the difference is >>>> huge. I compiled sw/ with >>>> >>>> make -sr -j8 >>>> >>>> on a i7 s2720 (2.2GHz), 8GB Ram laptop. >>> One important addition: precompiled headers are only supported on >>> Windows (my experiment took place on Windows7). I guess the other >>> systems are fast enough without precompiled headers. >>> >> Also, I'm not an expert, but I think that there's a difference for >> release artifacts whether or not you compile with PCH. I know that the >> chromium project, for example, recommends PCH for debug builds, but for >> final releases, removing PCH is a big part of the optimizations... > > Good to know. Do you have any pointers? > -Andre
I don't :(. I only remember having heard about the performance hit once, but lack of Googled information on the subjects suggests that I may be wrong/outdated. About the chromium project, see this link https://code.google.com/p/chromium/wiki/WindowsPrecompiledHeaders which mentions the bit of gospel I mentioned above (by default for non-official builds) without really explaining why the release build doesn't use it by default. Sorry I can't be more helpful, Issac --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@openoffice.apache.org For additional commands, e-mail: dev-h...@openoffice.apache.org
