HACKER Q&A
📣 faizshah

Where can I learn about programming SIMD and branchless programming?


I was really impressed by this simdjson library’s performance: https://github.com/simdjson/simdjson

But I had never heard of this kind of programming using SIMD and “branchless” programming. Does anyone know of a resource where I can learn how to do this kind of programming?

More on this style of programming in this thread from the contributors to simdjson: https://news.ycombinator.com/item?id=22754841

  👤 fwsgonzo Accepted Answer ✓
Creels on youtube is a good start if you're interested in that sort of thing.

Also, this will amaze you: https://github.com/komrad36/CRC

Knowing details about your system can give you 60x speedup over naive implementations. That CRC32 (Castagnoli) checksum is also 29x faster than the best you can do in WebAssembly, for example.

👤 kardos
Branchfree.org has some good reads on the topic in blog form