Data Caching and Code Optimizations

[albinopapa]

SOA Count = 200000
AOS Count = 20000

Can you see where the 10x speed up comes from?

I would probably make a statement at the top

constexpr auto numElements = 200000ui64;

Then just use the numElements to init all your array sizes and counts. Doing that I get

SOA Time taken: 0.00158667
AOS Time taken: 0.00180841

Those times are in seconds instead of the large nanoseconds

Here are the nano-seconds
SOA Time taken: 1606395
AOS Time taken: 2109330

Here are my specs, btw:
AMD (APU) A10 7870K CPU @ 3.9ghz
12GB DDR3-1333 (10.8GB usable)
Windows 10 64x

[cyboryxmen]

Oh hey you read my unedited post. You should read the latest one where I posted the more accurate results. The gist of it is that I started with a single .exe and it gave me weird results. That was where I separated it into two solutions generating 2 .exes but I set the other to debug instead of release(plus the different sizes). The disadvantage of programming two .exes at once.

The results vary a little. Sometimes Struct of Arrays is slightly better. Sometimes Array of Struct is slightly better. They do average out and in the end, their timings are pretty much the same.