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When I started writing a tiling simplex noise function in #RustLang two weeks ago, it ran in about 100 milliseconds for a block of 2048×2048 pixels.
Now it runs in 1.3 milliseconds. That's 13 GB/s throughput; maybe memory is even the bottleneck now.
Lessons learned:
- AVX2 is awesome
- simdeez makes it relatively easy to use
- simdnoise is damn clever
- iterators are slow
- collecting into a Vec first is faster
- iterating over coordinates manually is the fastest
- rayon is awesome
Computers are insanely fast these days, but you have to ask nicely.
@thomastc yes with a program called ccleaner and bleachbit and following through with putting all unnecessary processes to a halt.
haxadecimal @thomastc
I do ask nicely, and the computer still f#@&s me over routinely.