4 ms·

Many thanks for providing the source. It also works on my machine. TIL.

• furyofantares 1y ago
  I tried the others on my x86 machine and they all do something for me - not nearly as much as the article, but something.
  • tapirl 1y ago
    The "_ [0]byte" trick has no base in my knowledge. For the author's specified example, [1024]float64 will be always allocated on one whole page, aka, always 64-byte aligned. For "Array of Structs vs Struct of Arrays", using slices as fields is a good idea. If the purpose is to make fields allocated on their respective memory block, just use pointers instead.
    • furyofantares 1y ago
      > The "_ [0]byte" trick has no base in my knowledge. For the author's specified example, [1024]float64 will be always allocated on one whole page, aka, always 64-byte aligned. You're right - I read the results I had wrong on that one. That one is slower, not faster, on both my M2 and on x86 machine.
      • tapirl 1y ago
        My last comment has imprecision and misunderstanding. > ... [1024]float64 will be always allocated on one whole page, aka, always 64-byte aligned. if it is allocated on heap and at the start of allocated memory block. > For "Array of Structs vs Struct of Arrays", using slices as fields is a good idea. If the purpose is to make fields allocated on their respective memory block, just use pointers instead. I misunderstood it. It is like row-based database vs. column-based database. Both ways have their respective advantages and disadvantages.