feat: enable SIMD

[yisibl]

Here's a nice article: Authoring a SIMD enhanced Wasm library with Rust

[vercel]

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Name	Status	Preview	Updated
resvg-js	✅ Ready (Inspect)	Visit Preview	Aug 15, 2022 at 2:26PM (UTC)

[shuding]

I compiled this project with RUSTFLAGS=\"-C target-feature=+simd128,+bulk-memory,+nontrapping-fptoint,+relaxed-simd -C opt-level=3\" wasm-pack build --target web --out-name index --out-dir wasm/dist --release --mode no-install and got a pretty impressive result.

[khiemtong]

Any chance this could be merged and released?

[yisibl]

@khiemtong Thanks for your interest in resvg-js.

In the long run, this feature will definitely be released. However, given that this increases the size of the wasm file, a separate npm package may need to be released. These tweaks would require some work, which I don't have time for at the moment.

[David-Development]

While the package size would increase - the compiler should be able to strip out the dependencies (wasm files) that are not required, right? (I'm using it in an Angular App and the wasm file is not compiled into the bundle anyways as I'm serving it separately). However the performance gains by using SIMD are enormous. I'm seeing a 2x/3x speedup for my use-case.

[linkmauve]

It seems wasm SIMD is supported pretty much everywhere nowadays, see https://caniuse.com/wasm-simd

Maybe instead of duplicating the library you could just unconditionally enable SIMD.

[yisibl]

@linkmauve Thank you for your attention. I will consider merging this PR as soon as possible.

[yisibl]

Consider Relaxed SIMD: rust-lang/rust#117468