Exploring SIMD performance improvements in WebAssembly

• flexible-vectors

  4 43 1.5 WebAssembly

  Vector operations for WebAssembly

  

Thanks! Good points, I think in general the fixed-width "packed" SIMD ISAs have the downsides that you mentioned.

But it seems that WebAssembly doesn't have length-agnostic SIMD instructions yet. There is an open proposal to add this though: https://github.com/WebAssembly/flexible-vectors

• simd-wasm-profiling

  1 6 0.0 WebAssembly

  Exploring SIMD performance improvements in WebAssembly

I actually tried comparing 128-bit SIMD to the 64-bit performance and the difference was 2x. I only published the results for the 4x comparison, but it should be pretty easy to reproduce if you change the types in the non-SIMD code[1] from i32 -> i64.

[1] https://github.com/awelm/simd-wasm-profiling/blob/master/fil...

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