perf: Improve dashboard performance by decreasing rerenders

superset-frontend/src/dashboard/components/Dashboard.jsx

@@ -26,11 +26,7 @@ import getBootstrapData from 'src/utils/getBootstrapData';
 import getChartIdsFromLayout from '../util/getChartIdsFromLayout';
 import getLayoutComponentFromChartId from '../util/getLayoutComponentFromChartId';
 
-import {
-  slicePropShape,
-  dashboardInfoPropShape,
-  dashboardStatePropShape,
-} from '../util/propShapes';
+import { slicePropShape } from '../util/propShapes';
 import {
   LOG_ACTIONS_HIDE_BROWSER_TAB,
   LOG_ACTIONS_MOUNT_DASHBOARD,
@@ -51,8 +47,10 @@ const propTypes = {
     logEvent: PropTypes.func.isRequired,
     clearDataMaskState: PropTypes.func.isRequired,
   }).isRequired,
-  dashboardInfo: dashboardInfoPropShape.isRequired,
-  dashboardState: dashboardStatePropShape.isRequired,
+  dashboardId: PropTypes.number.isRequired,
+  editMode: PropTypes.bool,
+  isPublished: PropTypes.bool,
+  hasUnsavedChanges: PropTypes.bool,
   slices: PropTypes.objectOf(slicePropShape).isRequired,
   activeFilters: PropTypes.object.isRequired,
   chartConfiguration: PropTypes.object,
@@ -96,13 +94,13 @@ class Dashboard extends PureComponent {
 
   componentDidMount() {
     const bootstrapData = getBootstrapData();
-    const { dashboardState, layout } = this.props;
+    const { editMode, isPublished, layout } = this.props;
     const eventData = {
       is_soft_navigation: Logger.timeOriginOffset > 0,
-      is_edit_mode: dashboardState.editMode,
+      is_edit_mode: editMode,
       mount_duration: Logger.getTimestamp(),
       is_empty: isDashboardEmpty(layout),
-      is_published: dashboardState.isPublished,
+      is_published: isPublished,
       bootstrap_data_length: bootstrapData.length,
     };
     const directLinkComponentId = getLocationHash();
@@ -130,7 +128,7 @@ class Dashboard extends PureComponent {
     const currentChartIds = getChartIdsFromLayout(this.props.layout);
     const nextChartIds = getChartIdsFromLayout(nextProps.layout);
 
-    if (this.props.dashboardInfo.id !== nextProps.dashboardInfo.id) {
+    if (this.props.dashboardId !== nextProps.dashboardId) {
       // single-page-app navigation check
       return;
     }
@@ -157,10 +155,14 @@ class Dashboard extends PureComponent {
   }
 
   applyCharts() {
-    const { hasUnsavedChanges, editMode } = this.props.dashboardState;
-
     const { appliedFilters, appliedOwnDataCharts } = this;
-    const { activeFilters, ownDataCharts, chartConfiguration } = this.props;
+    const {
+      activeFilters,
+      ownDataCharts,
+      chartConfiguration,
+      hasUnsavedChanges,
+      editMode,
+    } = this.props;
     if (
       isFeatureEnabled(FeatureFlag.DashboardCrossFilters) &&
       !chartConfiguration

superset-frontend/src/dashboard/components/DashboardBuilder/DashboardBuilder.test.tsx

@@ -208,7 +208,9 @@ describe('DashboardBuilder', () => {
   });
 
   it('should render a BuilderComponentPane if editMode=true and user selects "Insert Components" pane', () => {
-    const { queryAllByTestId } = setup({ dashboardState: { editMode: true } });
+    const { queryAllByTestId } = setup({
+      dashboardState: { ...mockState.dashboardState, editMode: true },
+    });
     const builderComponents = queryAllByTestId('mock-builder-component-pane');
     expect(builderComponents.length).toBeGreaterThanOrEqual(1);
   });
@@ -241,7 +243,7 @@ describe('DashboardBuilder', () => {
 
   it('should display a loading spinner when saving is in progress', async () => {
     const { findByAltText } = setup({
-      dashboardState: { dashboardIsSaving: true },
+      dashboardState: { ...mockState.dashboardState, dashboardIsSaving: true },
     });
 
     expect(await findByAltText('Loading...')).toBeVisible();

superset-frontend/src/dashboard/components/DashboardBuilder/DashboardBuilder.tsx

@@ -370,6 +370,10 @@ const StyledDashboardContent = styled.div<{
   `}
 `;
 
+const ELEMENT_ON_SCREEN_OPTIONS = {
+  threshold: [1],
+};
+
 const DashboardBuilder: FC<DashboardBuilderProps> = () => {
   const dispatch = useDispatch();
   const uiConfig = useUiConfig();
@@ -469,9 +473,9 @@ const DashboardBuilder: FC<DashboardBuilderProps> = () => {
     nativeFiltersEnabled,
   } = useNativeFilters();
 
-  const [containerRef, isSticky] = useElementOnScreen<HTMLDivElement>({
-    threshold: [1],
-  });
+  const [containerRef, isSticky] = useElementOnScreen<HTMLDivElement>(
+    ELEMENT_ON_SCREEN_OPTIONS,
+  );
 
   const showFilterBar =
     (crossFiltersEnabled || nativeFiltersEnabled) && !editMode;
@@ -581,6 +585,43 @@ const DashboardBuilder: FC<DashboardBuilderProps> = () => {
       ? 0
       : theme.gridUnit * 8;
 
+  const renderChild = useCallback(
+    adjustedWidth => {
+      const filterBarWidth = dashboardFiltersOpen
+        ? adjustedWidth
+        : CLOSED_FILTER_BAR_WIDTH;
+      return (
+        <FiltersPanel
+          width={filterBarWidth}
+          hidden={isReport}
+          data-test="dashboard-filters-panel"
+        >
+          <StickyPanel ref={containerRef} width={filterBarWidth}>
+            <ErrorBoundary>
+              <FilterBar
+                orientation={FilterBarOrientation.Vertical}
+                verticalConfig={{
+                  filtersOpen: dashboardFiltersOpen,
+                  toggleFiltersBar: toggleDashboardFiltersOpen,
+                  width: filterBarWidth,
+                  height: filterBarHeight,
+                  offset: filterBarOffset,
+                }}
+              />
+            </ErrorBoundary>
+          </StickyPanel>
+        </FiltersPanel>
+      );
+    },
+    [
+      dashboardFiltersOpen,
+      toggleDashboardFiltersOpen,
+      filterBarHeight,
+      filterBarOffset,
+      isReport,
+    ],
+  );
+
   return (
     <DashboardWrapper>
       {showFilterBar &&
@@ -593,33 +634,7 @@ const DashboardBuilder: FC<DashboardBuilderProps> = () => {
               maxWidth={OPEN_FILTER_BAR_MAX_WIDTH}
               initialWidth={OPEN_FILTER_BAR_WIDTH}
             >
-              {adjustedWidth => {
-                const filterBarWidth = dashboardFiltersOpen
-                  ? adjustedWidth
-                  : CLOSED_FILTER_BAR_WIDTH;
-                return (
-                  <FiltersPanel
-                    width={filterBarWidth}
-                    hidden={isReport}
-                    data-test="dashboard-filters-panel"
-                  >
-                    <StickyPanel ref={containerRef} width={filterBarWidth}>
-                      <ErrorBoundary>
-                        <FilterBar
-                          orientation={FilterBarOrientation.Vertical}
-                          verticalConfig={{
-                            filtersOpen: dashboardFiltersOpen,
-                            toggleFiltersBar: toggleDashboardFiltersOpen,
-                            width: filterBarWidth,
-                            height: filterBarHeight,
-                            offset: filterBarOffset,
-                          }}
-                        />
-                      </ErrorBoundary>
-                    </StickyPanel>
-                  </FiltersPanel>
-                );
-              }}
+              {renderChild}
             </ResizableSidebar>
           </>
         )}