diff --git a/package.json b/package.json
index efaa09019..8ee8398cc 100644
--- a/package.json
+++ b/package.json
@@ -118,12 +118,11 @@
     "react-highlight-words": "^0.20.0",
     "react-plotly.js": "^2.6.0",
     "react-spring": "^9.7.4",
+    "react-window": "^1.8.10",
     "use-deep-compare-effect": "^1.8.1",
-    "visyn_scripts": "^11.1.0",
-    "react-window": "^1.8.10"
+    "visyn_scripts": "^11.1.0"
   },
   "devDependencies": {
-    "@types/react-window": "^1.8.8",
     "@chromatic-com/playwright": "^0.6.18",
     "@chromatic-com/storybook": "^1.8.0",
     "@playwright/test": "^1.45.2",
@@ -137,6 +136,7 @@
     "@storybook/react": "^7.6.20",
     "@storybook/react-webpack5": "^7.6.20",
     "@storybook/testing-library": "0.2.2",
+    "@types/react-window": "^1.8.8",
     "chromatic": "^11.7.1",
     "storybook": "^7.6.20",
     "storybook-addon-swc": "^1.2.0"
diff --git a/src/demo/MainApp.tsx b/src/demo/MainApp.tsx
index 4e2f94362..8922e1446 100644
--- a/src/demo/MainApp.tsx
+++ b/src/demo/MainApp.tsx
@@ -15,16 +15,17 @@ import {
   IBarConfig,
   Vis,
 } from '../vis';
-import { breastCancerData } from '../vis/stories/breastCancerData';
-import { fetchBreastCancerData } from '../vis/stories/fetchBreastCancerData';
 import { MyCategoricalScore, MyLinkScore, MyNumberScore, MySMILESScore, MyStringScore } from './scoresUtils';
+import { explodedData, fetchExplodedData } from '../vis/stories/explodedData';
 
 export function MainApp() {
   const { user } = useVisynAppContext();
-  const [visConfig, setVisConfig] = React.useState<BaseVisConfig>({
-    type: ESupportedPlotlyVis.BAR,
-    numColumnsSelected: [],
-    catColumnSelected: {
+  const [visConfig, setVisConfig] = React.useState<BaseVisConfig>(
+    () =>
+      ({
+        type: ESupportedPlotlyVis.BAR,
+        numColumnsSelected: [],
+        /* catColumnSelected: {
       description: null,
       id: 'cellularity',
       name: 'Cellularity',
@@ -33,34 +34,47 @@ export function MainApp() {
       description: 'some very long description',
       id: 'breastSurgeryType',
       name: 'Breast Surgery Type',
-    },
-    groupType: EBarGroupingType.STACK,
-    facets: {
+    }, */
+        catColumnSelected: {
+          description: 'some very long description',
+          id: 'categorical2',
+          name: 'Categorical 2',
+        },
+        group: null,
+        groupType: EBarGroupingType.STACK,
+        /* facets: {
       description: 'some very long description',
       id: 'tumorOtherHistologicSubtype',
       name: 'Tumor Other Histologic Subtype',
-    },
-    focusFacetIndex: null,
-    display: EBarDisplayType.ABSOLUTE,
-    direction: EBarDirection.HORIZONTAL,
-    aggregateColumn: {
+    }, */
+        facets: {
+          description: 'some very long description',
+          id: 'categorical1',
+          name: 'Categorical 1',
+        },
+        focusFacetIndex: null,
+        display: EBarDisplayType.ABSOLUTE,
+        direction: EBarDirection.HORIZONTAL,
+        /* aggregateColumn: {
       description: 'some very long description',
       id: 'tumorStage',
       name: 'Tumor Stage',
-    },
-    aggregateType: EAggregateTypes.COUNT,
-    showFocusFacetSelector: false,
-    sortState: {
-      x: EBarSortState.DESCENDING,
-      y: EBarSortState.NONE,
-    },
-    numColorScaleType: ENumericalColorScaleType.SEQUENTIAL,
-    merged: true,
-  } as IBarConfig);
-  const columns = React.useMemo(() => (user ? fetchBreastCancerData() : []), [user]);
-  const [selection, setSelection] = React.useState<typeof breastCancerData>([]);
+    }, */
+        aggregateColumn: null,
+        aggregateType: EAggregateTypes.COUNT,
+        showFocusFacetSelector: false,
+        sortState: {
+          x: EBarSortState.DESCENDING,
+          y: EBarSortState.NONE,
+        },
+        numColorScaleType: ENumericalColorScaleType.SEQUENTIAL,
+        merged: true,
+      }) as IBarConfig,
+  );
+  const columns = React.useMemo(() => (user ? fetchExplodedData() : []), [user]);
+  const [selection, setSelection] = React.useState<typeof explodedData>([]);
 
-  const visSelection = React.useMemo(() => selection.map((s) => `${breastCancerData.indexOf(s)}`), [selection]);
+  const visSelection = React.useMemo(() => selection.map((s) => `${explodedData.indexOf(s)}`), [selection]);
   const [loading, setLoading] = React.useState(false);
   const lineupRef = React.useRef<DatavisynTaggle>();
 
@@ -119,7 +133,7 @@ export function MainApp() {
             />
 
             <VisynRanking
-              data={breastCancerData}
+              data={explodedData}
               selection={selection}
               setSelection={setSelection}
               getBuilder={({ data }) => defaultBuilder({ data, smilesOptions: { setDynamicHeight: true } })}
@@ -138,7 +152,7 @@ export function MainApp() {
             selected={visSelection}
             selectionCallback={(s) => {
               if (s) {
-                setSelection(s.map((i) => breastCancerData[+i]!));
+                setSelection(s.map((i) => explodedData[+i]!));
               }
             }}
             filterCallback={(f) => {
diff --git a/src/vis/bar/BarChart.tsx b/src/vis/bar/BarChart.tsx
index a5fbac290..a0ca7839e 100644
--- a/src/vis/bar/BarChart.tsx
+++ b/src/vis/bar/BarChart.tsx
@@ -1,5 +1,5 @@
 import { Center, Group, Loader, ScrollArea, Stack } from '@mantine/core';
-import { VariableSizeList as List } from 'react-window';
+import { VariableSizeList as List, ListChildComponentProps } from 'react-window';
 import { useElementSize } from '@mantine/hooks';
 import { scaleOrdinal, schemeBlues } from 'd3v7';
 import { uniqueId, zipWith, sortBy } from 'lodash';
@@ -116,6 +116,41 @@ export function BarChart({
   const isToolbarVisible = config?.showFocusFacetSelector || showDownloadScreenshot || config?.display !== EBarDisplayType.NORMALIZED;
   const innerHeight = containerHeight - (isToolbarVisible ? 40 : 0);
 
+  const itemData = React.useMemo(
+    () => ({
+      dataTable,
+      selectedList,
+      selectedMap,
+      groupColorScale,
+      filteredUniqueFacetVals,
+      config,
+      setConfig,
+      allUniqueFacetVals,
+      customSelectionCallback,
+    }),
+    [dataTable, selectedList, selectedMap, customSelectionCallback, setConfig, groupColorScale, filteredUniqueFacetVals, config, allUniqueFacetVals],
+  );
+
+  const renderer = React.useCallback((props: ListChildComponentProps<typeof itemData>) => {
+    const multiplesVal = props.data.filteredUniqueFacetVals[props.index];
+
+    return (
+      <div style={props.style}>
+        <SingleEChartsBarChart
+          config={props.data.config}
+          dataTable={props.data.dataTable}
+          selectedList={props.data.selectedList}
+          selectedFacetValue={multiplesVal}
+          selectedFacetIndex={multiplesVal ? props.data.allUniqueFacetVals.indexOf(multiplesVal) : undefined} // use the index of the original list to return back to the grid
+          setConfig={props.data.setConfig}
+          selectionCallback={props.data.customSelectionCallback}
+          groupColorScale={props.data.groupColorScale}
+          selectedMap={props.data.selectedMap}
+        />
+      </div>
+    );
+  }, []);
+
   return (
     <Stack data-testid="vis-bar-chart-container" flex={1} style={{ width: '100%', height: '100%' }} ref={resizeObserverRef}>
       {showDownloadScreenshot || config.showFocusFacetSelector === true ? (
@@ -144,36 +179,19 @@ export function BarChart({
           </ScrollArea.Autosize>
         ) : null}
 
-        {colsStatus === 'success' && config?.facets && allColumns?.facetsColVals && (
+        {colsStatus === 'success' && config?.facets && allColumns?.facetsColVals ? (
           <List
             height={innerHeight}
             itemCount={filteredUniqueFacetVals.length}
             itemSize={(index) => {
               return calculateChartHeight(config, dataTable, filteredUniqueFacetVals[index]);
             }}
+            itemData={itemData}
             width="100%"
           >
-            {({ index, style }) => {
-              const multiplesVal = filteredUniqueFacetVals[index];
-              return (
-                <div key={index} style={style}>
-                  <SingleEChartsBarChart
-                    key={multiplesVal}
-                    config={config}
-                    dataTable={dataTable}
-                    selectedList={selectedList}
-                    selectedFacetValue={multiplesVal}
-                    selectedFacetIndex={allUniqueFacetVals.indexOf(multiplesVal)} // use the index of the original list to return back to the grid
-                    setConfig={setConfig}
-                    selectionCallback={customSelectionCallback}
-                    groupColorScale={groupColorScale}
-                    selectedMap={selectedMap}
-                  />
-                </div>
-              );
-            }}
+            {renderer}
           </List>
-        )}
+        ) : null}
       </Stack>
     </Stack>
   );
diff --git a/src/vis/stories/explodedData.ts b/src/vis/stories/explodedData.ts
new file mode 100644
index 000000000..5323180fd
--- /dev/null
+++ b/src/vis/stories/explodedData.ts
@@ -0,0 +1,111 @@
+import { EColumnTypes, VisColumn } from '../interfaces';
+
+export interface ExplodedItem {
+  name: string;
+  age: number;
+  numerical1: number;
+  numerical2: number;
+  categorical1: string;
+  categorical2: string;
+  statusFlag: 'active' | 'inactive';
+  type1: 'TYPE_A' | 'TYPE_B' | 'TYPE_C' | 'TYPE_D' | 'TYPE_E';
+  type2: 'TYPE_A' | 'TYPE_B' | 'TYPE_C' | 'TYPE_D' | 'TYPE_E';
+}
+
+const POSSIBLE_NAMES = ['Alice', 'Bob', 'Charlie', 'David', 'Eve', 'Frank', 'Grace', 'Hannah', 'Ivan', 'Jack'];
+
+/**
+ * Artificially exploded test dataset to check for performance issues.
+ */
+function generate(amount: number) {
+  return Array.from({ length: amount }).map(() => {
+    return {
+      name: POSSIBLE_NAMES[Math.floor(Math.random() * POSSIBLE_NAMES.length)],
+      age: Math.floor(Math.random() * 100),
+      numerical1: Math.random() * 100,
+      numerical2: Math.random() * 100,
+      categorical1: `Category ${Math.floor(Math.random() * 10)}`,
+      categorical2: `Category ${Math.floor(Math.random() * 10)}`,
+      statusFlag: Math.random() > 0.5 ? 'active' : 'inactive',
+      type1: `TYPE_${String.fromCharCode(65 + Math.floor(Math.random() * 5))}` as any,
+      type2: `TYPE_${String.fromCharCode(65 + Math.floor(Math.random() * 5))}` as any,
+    };
+  });
+}
+
+export const explodedData = generate(100000);
+
+export function fetchExplodedData(): VisColumn[] {
+  return [
+    {
+      info: {
+        description: 'The name of the patient',
+        id: 'name',
+        name: 'Name',
+      },
+      type: EColumnTypes.CATEGORICAL,
+      values: () => explodedData.map((r) => r.name).map((val, i) => ({ id: i.toString(), val })),
+      domain: POSSIBLE_NAMES,
+    },
+    {
+      info: {
+        description: 'The age of the patient',
+        id: 'age',
+        name: 'Age',
+      },
+      type: EColumnTypes.NUMERICAL,
+      values: () => explodedData.map((r) => r.age).map((val, i) => ({ id: i.toString(), val })),
+      domain: [0, 100],
+    },
+    {
+      info: {
+        description: 'The first numerical value',
+        id: 'numerical1',
+        name: 'Numerical 1',
+      },
+      type: EColumnTypes.NUMERICAL,
+      values: () => explodedData.map((r) => r.numerical1).map((val, i) => ({ id: i.toString(), val })),
+      domain: [0, 100],
+    },
+    {
+      info: {
+        description: 'The second numerical value',
+        id: 'numerical2',
+        name: 'Numerical 2',
+      },
+      type: EColumnTypes.NUMERICAL,
+      values: () => explodedData.map((r) => r.numerical2).map((val, i) => ({ id: i.toString(), val })),
+      domain: [0, 100],
+    },
+    {
+      info: {
+        description: 'The first categorical value',
+        id: 'categorical1',
+        name: 'Categorical 1',
+      },
+      type: EColumnTypes.CATEGORICAL,
+      values: () => explodedData.map((r) => r.categorical1).map((val, i) => ({ id: i.toString(), val })),
+      domain: Array.from(new Set(explodedData.map((r) => r.categorical1))),
+    },
+    {
+      info: {
+        description: 'The second categorical value',
+        id: 'categorical2',
+        name: 'Categorical 2',
+      },
+      type: EColumnTypes.CATEGORICAL,
+      values: () => explodedData.map((r) => r.categorical2).map((val, i) => ({ id: i.toString(), val })),
+      domain: Array.from(new Set(explodedData.map((r) => r.categorical2))),
+    },
+    {
+      info: {
+        description: 'The status flag',
+        id: 'statusFlag',
+        name: 'Status Flag',
+      },
+      type: EColumnTypes.CATEGORICAL,
+      values: () => explodedData.map((r) => r.statusFlag).map((val, i) => ({ id: i.toString(), val })),
+      domain: ['active', 'inactive'],
+    },
+  ];
+}
diff --git a/tsconfig.json b/tsconfig.json
index 801c29aa0..9b30d4c4e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,6 +3,7 @@
   "compilerOptions": {
     "jsx": "react",
     "outDir": "./dist",
+    "strict": false,
   },
   "include": [
     "src/**/*.ts",