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Disable SIMD for PPC64 architecture, add UNDICI_NO_WASM_SIMD env to facilitate testing #4530

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Merged
Uzlopak merged 6 commits into from
Sep 8, 2025
Merged

Disable SIMD for PPC64 architecture, add UNDICI_NO_WASM_SIMD env to facilitate testing #4530

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55d1c10
Disable SIMD for PPC64 architecture, add UNDICI_NO_WASM_SIMD env to f…
mcollina Sep 8, 2025
545b0b8
fixup
mcollina Sep 8, 2025
ce9f9bd
fixup
mcollina Sep 8, 2025
b6438b1
fixup
mcollina Sep 8, 2025
ef0e7e4
Update lib/dispatcher/client-h1.js
mcollina Sep 8, 2025
4fcd767
Apply suggestions from code review
Uzlopak Sep 8, 2025
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23 changes: 19 additions & 4 deletions lib/dispatcher/client-h1.js
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Original file line number Diff line number Diff line change
Expand Up @@ -64,11 +64,26 @@ function lazyllhttp () {
const llhttpWasmData = process.env.JEST_WORKER_ID ? require('../llhttp/llhttp-wasm.js') : undefined

let mod
try {
mod = new WebAssembly.Module(require('../llhttp/llhttp_simd-wasm.js'))
} catch {
/* istanbul ignore next */

// We disable wasm SIMD on ppc64 as it seems to be broken on Power 9 architectures.
let useWasmSIMD = process.arch !== 'ppc64'
// The Env Variable UNDICI_NO_WASM_SIMD allows explicitly overriding the default behavior
if (process.env.UNDICI_NO_WASM_SIMD === '1') {
useWasmSIMD = true
} else if (process.env.UNDICI_NO_WASM_SIMD === '0') {
useWasmSIMD = false
}

if (useWasmSIMD) {
try {
mod = new WebAssembly.Module(require('../llhttp/llhttp_simd-wasm.js'))
/* istanbul ignore next */
} catch {
}
}

/* istanbul ignore next */
if (!mod) {
// We could check if the error was caused by the simd option not
// being enabled, but the occurring of this other error
// * https://github.com/emscripten-core/emscripten/issues/11495
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