None of the tricks in this article get verified. It is totally solemn drivel.
Interesting and surprisingly, there are numerous praising comments here.
Interesting and surprisingly, there are numerous praising comments here.
Of course I didn't verify the results I got either - I'm not about to spend hours trying to figure out if this is just slop. But I think it is.
Looks like the LLM invented somewhat different test for it than the article had. I tried again and have this with the same data structure as in the article:
That gave similar results to the article.
All the other tests still give little-to-no speedup on my machine.
TIL.
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.
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.
> ... [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.