perf: finalize ultra-fast shorten API with optimistic insert and clean response

src/app/api/shorten/route.ts

@@ -6,10 +6,8 @@ import { generateRandomCode, getDefaultUrlLength } from "@/lib/short-code";
 import { generateQRCodeDataUrl } from "@/lib/qr";
 
 export async function POST(req: Request) {
-  const t0 = performance.now();
   try {
     const user = await getCurrentUser();
-    const tAuth = performance.now();
     const body = await req.json();
     const { url, custom_code, password, tags, expires_at, display_on_portal } = body;
 
@@ -135,15 +133,12 @@ export async function POST(req: Request) {
         }
       }
     }
-    const tDb = performance.now();
-
     // Build absolute short URL
     const appUrl = (process.env.NEXT_PUBLIC_APP_URL || "http://localhost:3000").replace(/\/$/, "");
     const fullShortUrl = `${appUrl}/${finalShortCode}`;
 
     // Generate QR Code
     const qrCodeDataUrl = await generateQRCodeDataUrl(fullShortUrl, { size: 240 });
-    const tQr = performance.now();
 
     return NextResponse.json({
       success: true,
@@ -159,12 +154,6 @@ export async function POST(req: Request) {
         display_on_portal: createdUrl.displayOnPortal,
         tags: createdUrl.tags ? createdUrl.tags.map((t: any) => t.name) : [],
       },
-      _timings: {
-        auth_ms: Math.round(tAuth - t0),
-        db_insert_ms: Math.round(tDb - tAuth),
-        qr_ms: Math.round(tQr - tDb),
-        total_server_ms: Math.round(tQr - t0),
-      },
     });
   } catch (error) {
     console.error("Shorten API error:", error);