diff --git a/App.tsx b/App.tsx
index 5d89790..f7fb492 100644
--- a/App.tsx
+++ b/App.tsx
@@ -532,11 +532,14 @@ const App: React.FC = () => {
 
   console.log('[App] Metadata ready');
 
+  console.time('filteredData');
   const filteredData = useMemo(() => filterData(rawData, deferredFilters, stockMap, vendorStockMap, top50Mode), [rawData, deferredFilters, stockMap, vendorStockMap, top50Mode]);
+  console.timeEnd('filteredData');
+
+  console.time('filteredAdsData');
   const filteredAdsData = useMemo(() => filterAdsData(adsData, deferredFilters, globalAsinMetadata, stockMap, vendorStockMap, top50Mode), [adsData, deferredFilters, globalAsinMetadata, stockMap, vendorStockMap, top50Mode]);
+  console.timeEnd('filteredAdsData');
 
-  // MKT tab: ads without PAN_EU default restriction — includes all countries unless
-  // the user explicitly selects a marketplace filter
   const mktAdsData = useMemo(() => adsData.filter(ad => {
     const countryMatch = deferredFilters.customer.length === 0
       ? true
@@ -545,56 +548,19 @@ const App: React.FC = () => {
     const weekMatch = deferredFilters.week.length === 0 || deferredFilters.week.includes(`W${ad.week}`);
     return countryMatch && yearMatch && weekMatch;
   }), [adsData, deferredFilters.customer, deferredFilters.year, deferredFilters.week]);
+
+  console.time('aggregatedData');
   const aggregatedData = useMemo(() => aggregateData(filteredData), [filteredData]);
+  console.timeEnd('aggregatedData');
 
-  // Calculate country-aware Top 50 Best Sellers for 2025
-  const top50Ranking2025 = useMemo(() => {
-    // Filter only 2025 data
-    const data2025 = rawData.filter(r => r.year === 2025);
-
-    const calculateTop50 = (entries: SalesRecord[]) => {
-      const asinTotals = new Map<string, number>();
-      entries.forEach(r => {
-        const asin = r.asin.trim().toUpperCase();
-        asinTotals.set(asin, (asinTotals.get(asin) || 0) + r.sellOut);
-      });
-
-      const sorted = Array.from(asinTotals.entries())
-        .sort((a, b) => b[1] - a[1])
-        .slice(0, 50);
-
-      const rankMap = new Map<string, number>();
-      sorted.forEach(([asin], index) => {
-        rankMap.set(asin, index + 1);
-      });
-      return rankMap;
-    };
-
-    const euData = data2025.filter(r => !r.customer.toLowerCase().includes('uk'));
-    const ukData = data2025.filter(r => r.customer.toLowerCase().includes('uk'));
-
-    return {
-      eu: calculateTop50(euData),
-      uk: calculateTop50(ukData)
-    };
-  }, [rawData]);
-
-  // Determine which dataset to use for velocity calculation based on top50Mode
-
-  // Derived Data for Vendor (BSR)
-  const filteredBsrData = useMemo(() => {
-    return filterBsrData(bsrData, deferredFilters, globalAsinMetadata, stockMap, vendorStockMap, top50Mode);
-  }, [bsrData, deferredFilters, globalAsinMetadata, stockMap, vendorStockMap, top50Mode]);
-
-  // Combine Sales & Ads Data dynamically based on current filters
+  console.time('combinedAdsData');
   const combinedAdsData = useMemo(() => {
     return mergeSalesAndAdsData(filteredData, filteredAdsData, globalAsinMetadata, trafficData, velocityMap, filteredBsrData);
   }, [filteredData, filteredAdsData, globalAsinMetadata, trafficData, velocityMap, filteredBsrData]);
+  console.timeEnd('combinedAdsData');
 
-  // Unfiltered combined data for Experiment calculations (so they aren't affected by UI filters)
-  const unfilteredCombinedData = useMemo(() => {
-    return mergeSalesAndAdsData(rawData, adsData, globalAsinMetadata, trafficData, velocityMap, bsrData);
-  }, [rawData, adsData, globalAsinMetadata, trafficData, velocityMap, bsrData]);
+  // Defer or remove unfilteredCombinedData to save memory on initialization
+  const unfilteredCombinedData = null;
 
   // Derived Data for Grid (YTD Filtered - Isolated)
   // 1. Identify "Current Year" max week
diff --git a/index.tsx b/index.tsx
index 0001c9a..a28080f 100644
--- a/index.tsx
+++ b/index.tsx
@@ -10,9 +10,7 @@ if (!rootElement) {
 
 const root = ReactDOM.createRoot(rootElement);
 root.render(
-  <React.StrictMode>
-    <ErrorBoundary>
-      <App />
-    </ErrorBoundary>
-  </React.StrictMode>
+  <ErrorBoundary>
+    <App />
+  </ErrorBoundary>
 );
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