Big speed difference on Mac vs CentOS

[danielhomer]

I've compiled the examples/main.go on both a MacBook Pro (Early 2015 i5) and CentOS (Amazon t2.large) and the OSX build is much faster

Mac

time ./main-osx --input=tlou2ps4pro1.jpg --output=test123.webp                                                                        10:40:01
file type: JPEG
3840px x 2160px
image written to test123.webp
        1.20 real         1.10 user         0.07 sys

t2.large

[ec2-user@ip-172-31-35-112 examples]$ time ./main --input=tlou2ps4pro1.jpg --output=test113.webp
file type: JPEG
3840px x 2160px
image written to test113.webp

real	0m8.039s
user	0m8.001s
sys	0m0.040s

Is there anything obvious I'm missing? I've tried the build-deps-linux.sh out of the box, as well as adding the following flags to the OpenCV cmake:

-DCMAKE_BUILD_TYPE=RELEASE -DWITH_TBB=ON -DWITH_IPP=ON -DWITH_V4L=ON -DENABLE_AVX=ON -DENABLE_SSSE3=ON -DENABLE_SSE41=ON -DENABLE_SSE42=ON -DENABLE_POPCNT=ON -DENABLE_FAST_MATH=ON -DBUILD_EXAMPLES=OFF -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF

But nothing is bringing it close to the Mac speed.

Cheers.

[brian-armstrong-discord]

Hi @danielhomer

I think this might have been due to a regression checked in here. Can you try again on the latest master?