Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
2017-03-10 6:26 GMT+01:00 Wang Bin : [...] Patch applied. Thank you, Carl Eugen ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/13/17, Carl Eugen Hoyos wrote: > 2017-03-13 10:08 GMT+01:00 Paul B Mahol : >> On 3/13/17, Carl Eugen Hoyos wrote: >>> 2017-03-13 3:16 GMT+01:00 Wang Bin : How to benchmark codecs? >>> >>> You could benchmark running fate but I wonder why. >> >> So speed is not really important at all here. > > On the contrary! > > But assuming a user who specifies --enable-small wants > smaller binaries seems natural to me and the decrease > in size looks impressive. If this is only for --enable-small its OK. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
http://stackoverflow.com/questions/15548023/clang-optimization-levels -Oz disables -slp-vectorizer and -vectorize-loops ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
2017-03-13 10:08 GMT+01:00 Paul B Mahol : > On 3/13/17, Carl Eugen Hoyos wrote: >> 2017-03-13 3:16 GMT+01:00 Wang Bin : >>> How to benchmark codecs? >> >> You could benchmark running fate but I wonder why. > > So speed is not really important at all here. On the contrary! But assuming a user who specifies --enable-small wants smaller binaries seems natural to me and the decrease in size looks impressive. > But if it is libav merge than it suddenly is. > > What a double standards! I have no idea about the relation here, I believe it is known that I am strongly opposed to continue doing unreviewed merges - especially if nobody is interested in fixing the unavoidable regressions - but this is most likely unrelated. Carl Eugen ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/13/17, Carl Eugen Hoyos wrote: > 2017-03-13 3:16 GMT+01:00 Wang Bin : >> How to benchmark codecs? > > You could benchmark running fate but I wonder why. So speed is not really important at all here. But if it is libav merge than it suddenly is. What a double standards! ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
2017-03-13 3:16 GMT+01:00 Wang Bin : > How to benchmark codecs? You could benchmark running fate but I wonder why. > Here is my configuration and result size. The total size of -Oz > static or dynamic libraries is about 1M smaller. This seems to be sufficient reason to apply the patch, I can confirm it does not break clang 3.4. Carl Eugen ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
How to benchmark codecs? Here is my configuration and result size. The total size of -Oz static or dynamic libraries is about 1M smaller. configure --disable-debug --enable-shared --enable-runtime-cpudetect --enable-hwaccels --enable-avresample --disable-postproc --install_name_dir=@rpath --enable-pic --extra-cflags="-mmacosx-version-min=10.7" --extra-ldflags="-mmacosx-version-min=10.7 -Wl,-rpath,@loader_path -Wl,-rpath,@loader_path/../Frameworks -Wl,-rpath,@loader_path/lib -Wl,-rpath,@loader_path/../lib" --enable-small -Os -rwxr-xr-x 1 501 20 10545284 3 10 11:11 ./libavcodec.57.64.101.dylib -rw-r--r-- 1 501 20 13434432 3 10 11:11 ./libavcodec.a -rwxr-xr-x 1 501 20 57784 3 10 11:11 ./libavdevice.57.1.100.dylib -rw-r--r-- 1 501 20 53464 3 10 11:11 ./libavdevice.a -rwxr-xr-x 1 501 20 1564396 3 10 11:11 ./libavfilter.6.65.100.dylib -rw-r--r-- 1 501 20 2268040 3 10 11:11 ./libavfilter.a -rwxr-xr-x 1 501 20 1774664 3 10 11:11 ./libavformat.57.56.101.dylib -rw-r--r-- 1 501 20 2823792 3 10 11:11 ./libavformat.a -rwxr-xr-x 1 501 20 117700 3 10 11:11 ./libavresample.3.1.0.dylib -rw-r--r-- 1 501 20 162760 3 10 11:11 ./libavresample.a -rwxr-xr-x 1 501 20 298520 3 10 11:11 ./libavutil.55.34.101.dylib -rw-r--r-- 1 501 20 395512 3 10 11:11 ./libavutil.a -rwxr-xr-x 1 501 20 106968 3 10 11:11 ./libswresample.2.3.100.dylib -rw-r--r-- 1 501 20 153400 3 10 11:11 ./libswresample.a -rwxr-xr-x 1 501 20 497460 3 10 11:11 ./libswscale.4.2.100.dylib -rw-r--r-- 1 501 20 614184 3 10 11:11 ./libswscale.a -Oz -rwxr-xr-x 1 501 20 9665732 3 10 11:39 ./libavcodec.57.64.101.dylib -rw-r--r-- 1 501 20 12597816 3 10 11:39 ./libavcodec.a -rwxr-xr-x 1 501 20 57736 3 10 11:39 ./libavdevice.57.1.100.dylib -rw-r--r-- 1 501 20 53376 3 10 11:39 ./libavdevice.a -rwxr-xr-x 1 501 20 1515268 3 10 11:39 ./libavfilter.6.65.100.dylib -rw-r--r-- 1 501 20 2223024 3 10 11:39 ./libavfilter.a -rwxr-xr-x 1 501 20 1733824 3 10 11:39 ./libavformat.57.56.101.dylib -rw-r--r-- 1 501 20 2787728 3 10 11:39 ./libavformat.a -rwxr-xr-x 1 501 20 113652 3 10 11:39 ./libavresample.3.1.0.dylib -rw-r--r-- 1 501 20 160920 3 10 11:39 ./libavresample.a -rwxr-xr-x 1 501 20 294424 3 10 11:39 ./libavutil.55.34.101.dylib -rw-r--r-- 1 501 20 390624 3 10 11:39 ./libavutil.a -rwxr-xr-x 1 501 20 102864 3 10 11:39 ./libswresample.2.3.100.dylib -rw-r--r-- 1 501 20 148336 3 10 11:39 ./libswresample.a -rwxr-xr-x 1 501 20 481020 3 10 11:39 ./libswscale.4.2.100.dylib -rw-r--r-- 1 501 20 599000 3 10 11:39 ./libswscale.a ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/10/2017 12:43 PM, Paul B Mahol wrote: > On 3/10/17, James Almer wrote: >> On 3/10/2017 10:50 AM, Paul B Mahol wrote: >>> On 3/10/17, wm4 wrote: On Fri, 10 Mar 2017 13:47:38 +0100 Paul B Mahol wrote: > On 3/10/17, Wang Bin wrote: >> >> > > I don't think this is good idea. Why not? >>> >>> Because it changes something that was working before. >> >> The only valid reason i could see to not go with this change is >> if the size gains are minimal and the speed loss considerable. >> Otherwise, if the end result is smaller than -Os then there's no >> reason to not use it. > > OP didn't posted results at all, so applying this would be blind move > IMHO. Agree. Some numbers would be good (resulting binary size, benchmarks of at least popular codecs, etc). ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/10/17, James Almer wrote: > On 3/10/2017 10:50 AM, Paul B Mahol wrote: >> On 3/10/17, wm4 wrote: >>> On Fri, 10 Mar 2017 13:47:38 +0100 >>> Paul B Mahol wrote: >>> On 3/10/17, Wang Bin wrote: > > I don't think this is good idea. >>> >>> Why not? >> >> Because it changes something that was working before. > > The only valid reason i could see to not go with this change is > if the size gains are minimal and the speed loss considerable. > Otherwise, if the end result is smaller than -Os then there's no > reason to not use it. OP didn't posted results at all, so applying this would be blind move IMHO. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/10/2017 10:50 AM, Paul B Mahol wrote: > On 3/10/17, wm4 wrote: >> On Fri, 10 Mar 2017 13:47:38 +0100 >> Paul B Mahol wrote: >> >>> On 3/10/17, Wang Bin wrote: >>> >>> I don't think this is good idea. >> >> Why not? > > Because it changes something that was working before. The only valid reason i could see to not go with this change is if the size gains are minimal and the speed loss considerable. Otherwise, if the end result is smaller than -Os then there's no reason to not use it. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On Fri, 10 Mar 2017 14:50:32 +0100 Paul B Mahol wrote: > On 3/10/17, wm4 wrote: > > On Fri, 10 Mar 2017 13:47:38 +0100 > > Paul B Mahol wrote: > > > >> On 3/10/17, Wang Bin wrote: > >> > > >> > > >> > >> I don't think this is good idea. > > > > Why not? > > Because it changes something that was working before. That's not a good reason at all. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/10/17, wm4 wrote: > On Fri, 10 Mar 2017 13:47:38 +0100 > Paul B Mahol wrote: > >> On 3/10/17, Wang Bin wrote: >> > >> > >> >> I don't think this is good idea. > > Why not? Because it changes something that was working before. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On Fri, 10 Mar 2017 13:47:38 +0100 Paul B Mahol wrote: > On 3/10/17, Wang Bin wrote: > > > > > > I don't think this is good idea. Why not? ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
On 3/10/17, Wang Bin wrote: > > I don't think this is good idea. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
[FFmpeg-devel] configure: clang -Oz for small size build to reduce size further
0001-configure-clang-Oz-for-small-size-build-to-reduce-si.patch Description: Binary data ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
