added memoization

client/packages/lowcoder/src/comps/comps/containerComp/containerView.tsx

@@ -24,7 +24,7 @@ import {
   DEFAULT_GRID_COLUMNS,
   DEFAULT_ROW_HEIGHT,
 } from "layout/calculateUtils";
-import _ from "lodash";
+import _, { isEqual } from "lodash";
 import {
   ActionExtraInfo,
   changeChildAction,
@@ -313,7 +313,7 @@ const ItemWrapper = styled.div<{ $disableInteract?: boolean }>`
   pointer-events: ${(props) => (props.$disableInteract ? "none" : "unset")};
 `;
 
-const GridItemWrapper = React.forwardRef(
+const GridItemWrapper = React.memo(React.forwardRef(
   (
     props: React.PropsWithChildren<HTMLAttributes<HTMLDivElement>>,
     ref: React.ForwardedRef<HTMLDivElement>
@@ -326,11 +326,11 @@ const GridItemWrapper = React.forwardRef(
       </ItemWrapper>
     );
   }
-);
+));
 
 type GirdItemViewRecord = Record<string, GridItem>;
 
-export function InnerGrid(props: ViewPropsWithSelect) {
+export const InnerGrid = React.memo((props: ViewPropsWithSelect) => {
   const {
     positionParams,
     rowCount = Infinity,
@@ -385,7 +385,7 @@ export function InnerGrid(props: ViewPropsWithSelect) {
 
   const canAddSelect = useMemo(
     () => _.size(containerSelectNames) === _.size(editorState.selectedCompNames),
-    [containerSelectNames, editorState]
+    [containerSelectNames, editorState.selectedCompNames]
   );
 
   const dispatchPositionParamsTimerRef = useRef(0);
@@ -432,16 +432,21 @@ export function InnerGrid(props: ViewPropsWithSelect) {
       onPositionParamsChange,
       onRowCountChange,
       positionParams,
-      props,
+      props.dispatch,
+      props.containerPadding,
     ]
   );
   const setSelectedNames = useCallback(
     (names: Set<string>) => {
       editorState.setSelectedCompNames(names);
     },
-    [editorState]
+    [editorState.setSelectedCompNames]
   );
-  const { width, ref } = useResizeDetector({ onResize, handleHeight: isRowCountLocked });
+
+  const { width, ref } = useResizeDetector({
+    onResize,
+    handleHeight: isRowCountLocked,
+  });
 
   const itemViewRef = useRef<GirdItemViewRecord>({});
   const itemViews = useMemo(() => {
@@ -464,9 +469,10 @@ export function InnerGrid(props: ViewPropsWithSelect) {
   const clickItem = useCallback(
     (
       e: React.MouseEvent<HTMLDivElement,
-      globalThis.MouseEvent>, name: string
+      globalThis.MouseEvent>,
+      name: string,
     ) => selectItem(e, name, canAddSelect, containerSelectNames, setSelectedNames),
-    [canAddSelect, containerSelectNames, setSelectedNames]
+    [selectItem, canAddSelect, containerSelectNames, setSelectedNames]
   );
 
   useEffect(() => {
@@ -555,7 +561,9 @@ export function InnerGrid(props: ViewPropsWithSelect) {
       {itemViews}
     </ReactGridLayout>
   );
-}
+}, (prevProps, newProps) => {
+  return isEqual(prevProps, newProps);
+});
 
 function selectItem(
   e: MouseEvent<HTMLDivElement>,

client/packages/lowcoder/src/comps/comps/gridLayoutComp/canvasView.tsx

@@ -1,6 +1,6 @@
 import { EditorContext } from "comps/editorState";
 import { EditorContainer } from "pages/common/styledComponent";
-import { Profiler, useContext, useRef, useState } from "react";
+import React, { Profiler, useContext, useRef, useState } from "react";
 import styled from "styled-components";
 import { profilerCallback } from "util/cacheUtils";
 import {
@@ -20,6 +20,7 @@ import { CanvasContainerID } from "constants/domLocators";
 import { CNRootContainer } from "constants/styleSelectors";
 import { ScrollBar } from "lowcoder-design";
 import { defaultTheme } from "@lowcoder-ee/constants/themeConstants";
+import { isEqual } from "lodash";
 
 // min-height: 100vh;
 
@@ -72,7 +73,7 @@ function getDragSelectedNames(
 
 const EmptySet = new Set<string>();
 
-export function CanvasView(props: ContainerBaseProps) {
+export const CanvasView = React.memo((props: ContainerBaseProps) => {
   const editorState = useContext(EditorContext);
   const [dragSelectedComps, setDragSelectedComp] = useState(EmptySet);
   const scrollContainerRef = useRef(null);
@@ -166,4 +167,6 @@ export function CanvasView(props: ContainerBaseProps) {
       </EditorContainer>
     </CanvasContainer>
   );
-}
+}, (prevProps, newProps) => {
+  return isEqual(prevProps, newProps);
+});

client/packages/lowcoder/src/comps/comps/gridLayoutComp/dragSelector.tsx

@@ -38,7 +38,7 @@ const InitialState = {
   startPoint: undefined,
 };
 
-export class DragSelector extends React.Component<SectionProps, SectionState> {
+class DragSelectorComp extends React.Component<SectionProps, SectionState> {
   private readonly selectAreaRef: React.RefObject<HTMLDivElement>;
 
   constructor(props: SectionProps) {
@@ -178,3 +178,5 @@ export class DragSelector extends React.Component<SectionProps, SectionState> {
     };
   }
 }
+
+export const DragSelector = React.memo(DragSelectorComp);

client/packages/lowcoder/src/comps/comps/rootComp.tsx

@@ -32,6 +32,8 @@ import {
 import RefTreeComp from "./refTreeComp";
 import { ExternalEditorContext } from "util/context/ExternalEditorContext";
 import { useUserViewMode } from "util/hooks";
+import React from "react";
+import { isEqual } from "lodash";
 
 const EditorView = lazy(
   () => import("pages/editor/editorView"),
@@ -55,7 +57,7 @@ const childrenMap = {
   preload: PreloadComp,
 };
 
-function RootView(props: RootViewProps) {
+const RootView = React.memo((props: RootViewProps) => {
   const previewTheme = useContext(ThemeContext);
   const { comp, isModuleRoot, ...divProps } = props;
   const [editorState, setEditorState] = useState<EditorState>();
@@ -143,7 +145,9 @@ function RootView(props: RootViewProps) {
       </PropertySectionContext.Provider>
     </div>
   );
-}
+}, (prevProps, nextProps) => {
+  return isEqual(prevProps, nextProps);
+});
 
 /**
  * Root Comp