Compile-time measurements in Chromium

[Hans Wennborg]

On Tue, Feb 7, 2012 at 09:43, Richard Guenther
<richard.guenther@gmail.com> wrote:
>> These are the average compile times for compiling a file in the set of
>> the 10 files that are slowest (as when compiled with gcc 4.4 using
>> -O2) to compile:
>>
>>            gcc 4.4  gcc 4.6  gcc 4.7  clang 3.0  clang 3.1
>> -fs-o -O0   2.18     1.70     1.86     1.70       1.66
>> -O0         5.87     5.33     5.71     2.90       2.85
>> -O0 -g      6.71     6.19     6.61     4.00       4.08
>> -O2         11.9     10.8     12.0     6.72       6.80
>> -O2 -g      13.2     13.6     15.1     9.57       9.78
>
> It would be interesting to have access to preprocessed source
> of the file that is slowest to compile (or alternatively the file from
> this set that shows the greatest difference between gcc 4.6 and gcc 4.7
> at -O2).  Can you open a bugzilla at gcc.gnu.org with that file(s)
> attached?

Sure! http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52147

I added preprocessed source for the slowest file
(content_message_generator.ii), and the file with largest relative
compile time difference between 4.6 and 4.7 (V8DerivedSources08.ii).

Thanks,
Hans