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Re: -fnative-struct improves timings slightly.
- To: cygwin-developers at cygwin dot com
- Subject: Re: -fnative-struct improves timings slightly.
- From: Christopher Faylor <cgf at redhat dot com>
- Date: Tue, 14 Nov 2000 10:14:03 -0500
- References: <20001114133208.18986.qmail@web106.yahoomail.com>
- Reply-To: cygwin-developers at cygwin dot com
On Tue, Nov 14, 2000 at 05:32:08AM -0800, Earnie Boyd wrote:
>--- Christopher Faylor <cgf@redhat.com> wrote:
>> On Mon, Nov 13, 2000 at 10:49:58AM -0800, Earnie Boyd wrote:
>> >There's been talk about -fnative-struct switch on the MinGW list and I
>> thought
>> >I'd give it a try when building Cygwin. Here are the timings:
>> >
>> >Before -fnative-struct:
>> > User time (seconds): 536.17
>> > System time (seconds): 593.31
>> > Percent of CPU this job got: 60%
>> > Elapsed (wall clock) time (h:mm:ss or m:ss): 31:16.34
>> >
>> >After -fnative-struct:
>> > User time (seconds): 529.86
>> > System time (seconds): 469.90
>> > Percent of CPU this job got: 61%
>> > Elapsed (wall clock) time (h:mm:ss or m:ss): 26:52.60
>> >
>> >BTW, FYI, the discussion in MinGW suggests that -fnative-struct improves
>> >intercompatibility with MSVC.
>>
>> This switch is not in the main gcc sources. Apparently it is one of
>> the additions that Mumit made to "his" version of gcc. That's what
>> we're using currently for cygwin but it's apt to disppear unless
>> someone champions getting this into the main repository.
>>
>
>A patch was supplied to GCC by Donn Terry of Interix.Com. See
>http://gcc.gnu.org/ml/gcc-patches/1999-06n/msg00702.html.
I'm aware of that. The patch is not in the main gcc sources. That is
my point.
cgf