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perf: memoize hash filter to eliminate redundant disk reads per build

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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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svemagie
2026-03-19 22:15:30 +01:00
parent 39aaf0b79d
commit 9ba7980bc3
1 changed files with 7 additions and 4 deletions
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eleventy.config.js
+7 -4
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@@ -740,14 +740,17 @@ export default function (eleventyConfig) {
return url.endsWith("/") ? url.slice(0, -1) : url; return url.endsWith("/") ? url.slice(0, -1) : url;
}); });
// Hash filter for cache busting - generates MD5 hash of file content // Hash filter for cache busting — memoized (same paths repeat across every page render)
const _hashCache = new Map();
eleventyConfig.on("eleventy.before", () => { _hashCache.clear(); });
eleventyConfig.addFilter("hash", (filePath) => { eleventyConfig.addFilter("hash", (filePath) => {
if (_hashCache.has(filePath)) return _hashCache.get(filePath);
try { try {
const fullPath = resolve(__dirname, filePath.startsWith("/") ? `.${filePath}` : filePath); const fullPath = resolve(__dirname, filePath.startsWith("/") ? `.${filePath}` : filePath);
const content = readFileSync(fullPath); const result = createHash("md5").update(readFileSync(fullPath)).digest("hex").slice(0, 8);
return createHash("md5").update(content).digest("hex").slice(0, 8); _hashCache.set(filePath, result);
return result;
} catch { } catch {
// Return timestamp as fallback if file not found
return Date.now().toString(36); return Date.now().toString(36);
} }
}); });