perf(dashboard): Virtualization POC

superset-frontend/packages/superset-ui-core/src/utils/featureFlags.ts

@@ -31,6 +31,7 @@ export enum FeatureFlag {
   DASHBOARD_FILTERS_EXPERIMENTAL = 'DASHBOARD_FILTERS_EXPERIMENTAL',
   DASHBOARD_NATIVE_FILTERS = 'DASHBOARD_NATIVE_FILTERS',
   DASHBOARD_NATIVE_FILTERS_SET = 'DASHBOARD_NATIVE_FILTERS_SET',
+  DASHBOARD_VIRTUALIZATION = 'DASHBOARD_VIRTUALIZATION',
   DASHBOARD_RBAC = 'DASHBOARD_RBAC',
   DATAPANEL_CLOSED_BY_DEFAULT = 'DATAPANEL_CLOSED_BY_DEFAULT',
   DISABLE_DATASET_SOURCE_EDIT = 'DISABLE_DATASET_SOURCE_EDIT',

superset-frontend/src/components/Chart/Chart.jsx

@@ -28,6 +28,7 @@ import ErrorBoundary from 'src/components/ErrorBoundary';
 import { Logger, LOG_ACTIONS_RENDER_CHART } from 'src/logger/LogUtils';
 import { URL_PARAMS } from 'src/constants';
 import { getUrlParam } from 'src/utils/urlUtils';
+import { isCurrentUserBot } from 'src/utils/isBot';
 import { ResourceStatus } from 'src/hooks/apiResources/apiResources';
 import ChartRenderer from './ChartRenderer';
 import { ChartErrorMessage } from './ChartErrorMessage';
@@ -74,6 +75,7 @@ const propTypes = {
   ownState: PropTypes.object,
   postTransformProps: PropTypes.func,
   datasetsStatus: PropTypes.oneOf(['loading', 'error', 'complete']),
+  isInView: PropTypes.bool,
 };
 
 const BLANK = {};
@@ -92,6 +94,7 @@ const defaultProps = {
   chartStackTrace: null,
   isDeactivatedViz: false,
   force: false,
+  isInView: true,
 };
 
 const Styles = styled.div`
@@ -307,11 +310,17 @@ class Chart extends React.PureComponent {
           width={width}
         >
           <div className="slice_container" data-test="slice-container">
-            <ChartRenderer
-              {...this.props}
-              source={this.props.dashboardId ? 'dashboard' : 'explore'}
-              data-test={this.props.vizType}
-            />
+            {this.props.isInView ||
+            !isFeatureEnabled(FeatureFlag.DASHBOARD_VIRTUALIZATION) ||
+            isCurrentUserBot() ? (
+              <ChartRenderer
+                {...this.props}
+                source={this.props.dashboardId ? 'dashboard' : 'explore'}
+                data-test={this.props.vizType}
+              />
+            ) : (
+              <Loading />
+            )}
           </div>
           {isLoading && !isDeactivatedViz && <Loading />}
         </Styles>

superset-frontend/src/dashboard/components/gridComponents/Chart.jsx

@@ -92,6 +92,7 @@ const propTypes = {
   filterState: PropTypes.object,
   postTransformProps: PropTypes.func,
   datasetsStatus: PropTypes.oneOf(['loading', 'error', 'complete']),
+  isInView: PropTypes.bool,
 };
 
 const defaultProps = {
@@ -382,6 +383,7 @@ class Chart extends React.Component {
       filterboxMigrationState,
       postTransformProps,
       datasetsStatus,
+      isInView,
     } = this.props;
 
     const { width } = this.state;
@@ -511,6 +513,7 @@ class Chart extends React.Component {
             filterboxMigrationState={filterboxMigrationState}
             postTransformProps={postTransformProps}
             datasetsStatus={datasetsStatus}
+            isInView={isInView}
           />
         </div>
       </SliceContainer>

superset-frontend/src/dashboard/components/gridComponents/ChartHolder.test.tsx

@@ -137,7 +137,7 @@ describe('ChartHolder', () => {
 
     rerender(
       <Provider store={store}>
-        <ChartHolder {...defaultProps} editMode />
+        <ChartHolder {...defaultProps} editMode isInView />
       </Provider>,
     );
 
@@ -414,6 +414,7 @@ describe('ChartHolder', () => {
           deleteComponent={deleteComponent}
           fullSizeChartId={null}
           editMode
+          isInView
         />
       </Provider>,
     );

superset-frontend/src/dashboard/components/gridComponents/ChartHolder.tsx

@@ -67,6 +67,8 @@ interface ChartHolderProps {
   handleComponentDrop: (...args: unknown[]) => unknown;
   setFullSizeChartId: (chartId: number | null) => void;
   postAddSliceFromDashboard?: () => void;
+
+  isInView: boolean;
 }
 
 const ChartHolder: React.FC<ChartHolderProps> = ({
@@ -91,6 +93,7 @@ const ChartHolder: React.FC<ChartHolderProps> = ({
   handleComponentDrop,
   setFullSizeChartId,
   postAddSliceFromDashboard,
+  isInView,
 }) => {
   const { chartId } = component.meta;
   const isFullSize = fullSizeChartId === chartId;
@@ -314,6 +317,7 @@ const ChartHolder: React.FC<ChartHolderProps> = ({
               setControlValue={handleExtraControl}
               extraControls={extraControls}
               postTransformProps={handlePostTransformProps}
+              isInView={isInView}
             />
             {editMode && (
               <HoverMenu position="top">

superset-frontend/src/dashboard/components/gridComponents/Row.jsx

@@ -19,6 +19,7 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import cx from 'classnames';
+import { FeatureFlag, isFeatureEnabled } from '@superset-ui/core';
 
 import DragDroppable from 'src/dashboard/components/dnd/DragDroppable';
 import DragHandle from 'src/dashboard/components/dnd/DragHandle';
@@ -32,6 +33,7 @@ import WithPopoverMenu from 'src/dashboard/components/menu/WithPopoverMenu';
 import { componentShape } from 'src/dashboard/util/propShapes';
 import backgroundStyleOptions from 'src/dashboard/util/backgroundStyleOptions';
 import { BACKGROUND_TRANSPARENT } from 'src/dashboard/util/constants';
+import { isCurrentUserBot } from 'src/utils/isBot';
 
 const propTypes = {
   id: PropTypes.string.isRequired,
@@ -61,6 +63,7 @@ class Row extends React.PureComponent {
     super(props);
     this.state = {
       isFocused: false,
+      isInView: false,
     };
     this.handleDeleteComponent = this.handleDeleteComponent.bind(this);
     this.handleUpdateMeta = this.handleUpdateMeta.bind(this);
@@ -69,6 +72,50 @@ class Row extends React.PureComponent {
       'background',
     );
     this.handleChangeFocus = this.handleChangeFocus.bind(this);
+
+    this.containerRef = React.createRef();
+    this.observerEnabler = null;
+    this.observerDisabler = null;
+  }
+
+  // if chart not rendered - render it if it's less than 1 view height away from current viewport
+  // if chart rendered - remove it if it's more than 4 view heights away from current viewport
+  componentDidMount() {
+    if (
+      isFeatureEnabled(FeatureFlag.DASHBOARD_VIRTUALIZATION) &&
+      !isCurrentUserBot()
+    ) {
+      this.observerEnabler = new IntersectionObserver(
+        ([entry]) => {
+          if (entry.isIntersecting && !this.state.isInView) {
+            this.setState({ isInView: true });
+          }
+        },
+        {
+          rootMargin: '100% 0px',
+        },
+      );
+      this.observerDisabler = new IntersectionObserver(
+        ([entry]) => {
+          if (!entry.isIntersecting && this.state.isInView) {
+            this.setState({ isInView: false });
+          }
+        },
+        {
+          rootMargin: '400% 0px',
+        },
+      );
+      const element = this.containerRef.current;
+      if (element) {
+        this.observerEnabler.observe(element);
+        this.observerDisabler.observe(element);
+      }
+    }
+  }
+
+  componentWillUnmount() {
+    this.observerEnabler?.disconnect();
+    this.observerDisabler?.disconnect();
   }
 
   handleChangeFocus(nextFocus) {
@@ -161,6 +208,7 @@ class Row extends React.PureComponent {
                 backgroundStyle.className,
               )}
               data-test={`grid-row-${backgroundStyle.className}`}
+              ref={this.containerRef}
             >
               {rowItems.map((componentId, itemIndex) => (
                 <DashboardComponent
@@ -178,6 +226,7 @@ class Row extends React.PureComponent {
                   onResizeStop={onResizeStop}
                   isComponentVisible={isComponentVisible}
                   onChangeTab={onChangeTab}
+                  isInView={this.state.isInView}
                 />
               ))}
 

superset-frontend/src/utils/isBot.ts

@@ -0,0 +1,21 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+// navigator.webdriver is true when browser is controlled by a bot
+export const isCurrentUserBot = () => window?.navigator?.webdriver;

superset-frontend/src/utils/isDashboardVirtualizationEnabled.ts

@@ -0,0 +1,30 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+export enum DASHBOARD_VIRTUALIZATION_MODE {
+  NONE = 'NONE',
+  VIEWPORT = 'VIEWPORT',
+  PAGINATED = 'PAGINATED',
+}
+
+export const isDashboardVirtualizationEnabled = (
+  virtualizationMode: DASHBOARD_VIRTUALIZATION_MODE,
+) =>
+  virtualizationMode === DASHBOARD_VIRTUALIZATION_MODE.VIEWPORT ||
+  virtualizationMode === DASHBOARD_VIRTUALIZATION_MODE.PAGINATED;

superset/config.py

@@ -425,6 +425,7 @@ def _try_json_readsha(filepath: str, length: int) -> Optional[str]:
     # Feature is under active development and breaking changes are expected
     "DASHBOARD_NATIVE_FILTERS_SET": False,
     "DASHBOARD_FILTERS_EXPERIMENTAL": False,
+    "DASHBOARD_VIRTUALIZATION": False,
     "GLOBAL_ASYNC_QUERIES": False,
     "VERSIONED_EXPORT": True,
     "EMBEDDED_SUPERSET": False,
@@ -761,7 +762,6 @@ def _try_json_readsha(filepath: str, length: int) -> Optional[str]:
 # Force refresh while auto-refresh in dashboard
 DASHBOARD_AUTO_REFRESH_MODE: Literal["fetch", "force"] = "force"
 
-
 # Default celery config is to use SQLA as a broker, in a production setting
 # you'll want to use a proper broker as specified here:
 # http://docs.celeryproject.org/en/latest/getting-started/brokers/index.html

superset/views/base.py

@@ -103,6 +103,7 @@
     "SQLALCHEMY_DISPLAY_TEXT",
     "GLOBAL_ASYNC_QUERIES_WEBSOCKET_URL",
     "DASHBOARD_AUTO_REFRESH_MODE",
+    "DASHBOARD_VIRTUALIZATION",
     "SCHEDULED_QUERIES",
     "EXCEL_EXTENSIONS",
     "CSV_EXTENSIONS",