Perf: further speed up infra

Build/lib/get-gorhill-publicsuffix.js

@@ -0,0 +1,34 @@
+const { toASCII } = require('punycode/');
+const fs = require('fs');
+const path = require('path');
+
+const publicSuffixPath = path.resolve(__dirname, '../../node_modules/.cache/public_suffix-list_dat.txt');
+const getPublicSuffixListDat = () => {
+  if (fs.existsSync(publicSuffixPath)) {
+    return fs.promises.readFile(publicSuffixPath, 'utf-8');
+  }
+  console.log('public_suffix_list.dat not found, fetch directly from remote.');
+  return fetch('https://publicsuffix.org/list/public_suffix_list.dat').then(r => r.text());
+};
+
+const getGorhillPublicSuffix = async () => {
+  const customFetch = async (url) => {
+    const buf = await fs.promises.readFile(url);
+    return {
+      arrayBuffer() { return Promise.resolve(buf.buffer); }
+    };
+  };
+
+  const [publicSuffixListDat, { default: gorhill }] = await Promise.all([
+    getPublicSuffixListDat(),
+    import('gorhill-publicsuffixlist')
+  ]);
+
+  gorhill.parse(publicSuffixListDat, toASCII);
+  await gorhill.enableWASM({ customFetch });
+
+  return gorhill;
+};
+
+const getGorhillPublicSuffixPromise = getGorhillPublicSuffix();
+module.exports.getGorhillPublicSuffixPromise = getGorhillPublicSuffixPromise;