Performance 3

others/warmup.mjs

@@ -0,0 +1,59 @@
+import http from 'http';
+
+const endpoints = [
+  'http://localhost:3000/',
+  'http://localhost:3000/g',
+  'http://localhost:3000/a'
+];
+
+function httpGet(url, timeout = 5000) {
+  return new Promise((resolve) => {
+    const req = http.get(url, (res) => {
+      res.on('data', () => {});
+      res.on('end', () => {
+        resolve({ url, statusCode: res.statusCode });
+      });
+    });
+
+    req.on('error', (e) => {
+      resolve({ url, error: e.message });
+    });
+
+    req.setTimeout(timeout, () => {
+      req.abort();
+      resolve({ url, error: 'Timeout' });
+    });
+  });
+}
+
+async function warm(retries = 2) {
+  const results = await Promise.all(endpoints.map(async (url) => {
+    for (let i = 0; i <= retries; i++) {
+      const res = await httpGet(url);
+      if (!res.error) {
+        console.log(`[WARMUP] ${url} → ${res.statusCode}`);
+        return res;
+      } else {
+        console.warn(`[WARMUP] ${url} attempt ${i + 1} failed: ${res.error}`);
+      }
+    }
+    return { url, error: `Failed after ${retries + 1} attempts` };
+  }));
+
+  const failed = results.filter(r => r.error);
+  if (failed.length) {
+    console.warn(`[WARMUP] Some endpoints failed to warm:`, failed);
+  } else {
+    console.log('[WARMUP] All endpoints warmed successfully');
+  }
+}
+
+async function periodicWarmup(intervalMs = 5 * 60 * 1000) {
+  while (true) {
+    await warm();
+    console.log('[WARMUP] Cycle done');
+    await new Promise(res => setTimeout(res, intervalMs));
+  }
+}
+
+setTimeout(() => periodicWarmup(), 2000);