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Emscripten: use better _Py_Version computation for worker module (#129757)

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Use integer bit shifting instead of conversion to strings to compute Python version.
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Agriya Khetarpal 2025-02-07 04:55:27 +00:00 • committed by GitHub
parent 0fef47e5bb
commit e2064d6750
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1 changed files with 3 additions and 6 deletions
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9
Tools/wasm/emscripten/web_example/python.worker.mjs
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@ -70,12 +70,9 @@ const emscriptenSettings = {
postMessage({ type: "ready", stdinBuffer: stdinBuffer.sab });
},
async preRun(Module) {
const versionHex = Module.HEAPU32[Module._Py_Version / 4].toString(16);
const versionTuple = versionHex
.padStart(8, "0")
.match(/.{1,2}/g)
.map((x) => parseInt(x, 16));
const [major, minor, ..._] = versionTuple;
const versionInt = Module.HEAPU32[Module._Py_Version >>> 2];
const major = (versionInt >>> 24) & 0xff;
const minor = (versionInt >>> 16) & 0xff;
// Prevent complaints about not finding exec-prefix by making a lib-dynload directory
Module.FS.mkdirTree(`/lib/python${major}.${minor}/lib-dynload/`);
Module.addRunDependency("install-stdlib");