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⚡ Enable rustc wasm SIMD for render-wasm builds (#12163)

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Set RUSTFLAGS target-feature=+simd128 on the emscripten
target so our Rust code can autovec; Skia SIMD remains
via the -simd prebuild and EMCC -msimd128.
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Alejandro Alonso 2026-10-07 14:52:46 +02:00 committed by GitHub
parent 6473dc85ab
commit 31000c3055
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7
render-wasm/_build_env
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@ -22,6 +22,13 @@ export CARGO_BUILD_TARGET=${CARGO_BUILD_TARGET:-"wasm32-unknown-emscripten"};
export CARGO_TARGET_DIR=${CARGO_TARGET_DIR:-"target/$RENDER_TARGET"};
export SKIA_BINARIES_URL=${SKIA_BINARIES_URL:-"https://github.com/penpot/skia-binaries/releases/download/0.153.3/skia-binaries-b7f043e0b1e2a850e702-wasm32-unknown-emscripten-gl-svg-textlayout-binary-cache-webp-pdf-simd.tar.gz"}
# Let rustc emit wasm SIMD for our Rust code (autovec / core::arch::wasm32).
# Skia SIMD still comes from the -simd prebuild + -msimd128 in EMCC_CFLAGS.
# Gate on the emscripten target so native `./test` is unaffected.
if [ "$CARGO_BUILD_TARGET" = "wasm32-unknown-emscripten" ]; then
export RUSTFLAGS="${RUSTFLAGS:-} -C target-feature=+simd128"
fi
# 256 MB of initial heap to perform less
# initial calls to memory grow.
export EM_INITIAL_HEAP=$((256 * 1024 * 1024))