2020 Mac Mini – Putting Apple Silicon M1 To The Test

Re:2020 Mac Mini – Putting Apple Silicon M1 To The Test by marmaduke on Tuesday November 17, 2020 @05:02PM (#25130549)

Hm my experience was that compiling C on arm was always super fast compared to x86, because the latter had much more work to do.

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Re:2020 Mac Mini – Putting Apple Silicon M1 To The Test by mlyle on Tuesday November 17, 2020 @05:22PM (#25130709)

This doesn't align with my experience. Clang is about the same, but GCC often seems much slower emitting cross-ARM code.

  jar% time x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   0.97s user 0.02s system 99% cpu 0.992 total
  jar% time x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   0.93s user 0.03s system 99% cpu 0.965 total
  jar% time x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   0.94s user 0.01s system 99% cpu 0.947 total
  jar% time x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  x86_64-linux-gnu-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   0.92s user 0.04s system 99% cpu 0.955 total

  jar% time arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   1.43s user 0.03s system 99% cpu 1.458 total
  jar% time arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   1.46s user 0.03s system 99% cpu 1.486 total
  jar% time arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   1.55s user 0.04s system 99% cpu 1.587 total
  jar% time arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I ../../shared/api
  arm-linux-gnueabihf-gcc --std=c99 -O3 -c insgps14state.c -I inc -I   1.44s user 0.03s system 99% cpu 1.471 total

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Re:2020 Mac Mini – Putting Apple Silicon M1 To The Test by marmaduke on Wednesday November 18, 2020 @08:17AM (#25136382)

That’s interesting. I was not cross compiling so maybe the arm system I was using was just faster.

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