Add some performance profiling, increase performance for loading thumbnail data

src/routes/+server.ts

@@ -1,8 +1,17 @@
+import { Logger } from '$lib/log';
 import type { RequestHandler } from './$types';
 
+const logger = new Logger('+server.ts /');
+
 export const GET = (async ({ fetch, setHeaders }) => {
+  const start = performance.now();
   setHeaders({
     'cache-control': 'max-age=10'
   });
-  return await fetch('api/posts');
+  const afterHeaders = performance.now();
+  logger.debug('Headers took', afterHeaders - start, 'ms');
+  const f = await fetch('api/posts?count=5');
+  const afterFetch = performance.now();
+  logger.debug('Fetch took', afterFetch - afterHeaders, 'ms');
+  return f;
 }) satisfies RequestHandler;