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by hsfzxjy 662 days ago
wasm has SIMD extension https://github.com/WebAssembly/simd/blob/master/proposals/si... . You can use them even in browsers (e.g. Chrome >= 91)
1 comments
jsheard 662 days ago
OP is asking how SIMD is beneficial to this specific application. If there's a small neural network involved then evaluating that is probably a good place to use SIMD.
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hsfzxjy 662 days ago
Yes. The program actually includes an ONNX runtime, which uses SIMD to accelerate NN inference.
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jcelerier 662 days ago
but... the program ends up entirely compiled and executed as TTF bytecode in the end right, since it's entirely contained in the TTF font ? And TTF bytecode is only the following instructions : https://developer.apple.com/fonts/TrueType-Reference-Manual/... and I don't see anything related to SIMD in there
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erk__ 662 days ago
No that is not what is happening, HarfBuzz have a experimental Wasm shaper, so the font embeds some wasm code that tells Harfbuzz what to output.

https://github.com/harfbuzz/harfbuzz/blob/main/docs/wasm-sha...

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jcelerier 662 days ago
oh ok, so it can't work in any system that doesn't use harfbuzz.. that's much less interesting than what I originally thought
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